Re: [sage-support] The sage notebook does not show results
Point 6 says "I don't thing the following sudo syntax works anymore. I > had to do this by hand now." Did you do that? > > I wouldn't know how to do that, but it ran smoothly, asked me for a path to place the key, a passphrase and it all worked seemingly fine. What happened on point 7 of instructions? If it worked, have you tried it > with accounts sage1, sage2 and so on? > > This did not work at all. It asked me for sage0's password, though I did not think it had one. I tried with oscarlazo's password which has root powers, but that didn't work either. oscarlazo@VIDEO-AF:~$ sudo -u sageserver ssh sage0@localhost echo Done sage0@localhost's password: Permission denied, please try again. sage0@localhost's password: Permission denied, please try again. sage0@localhost's password: Permission denied (publickey,password). How could the sage0, sage1,... passwords be changed? Thank you! Oscar -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] The sage notebook does not show results
Hello Sage people! I am setting up a sage notebook server at my research institute to showcase software I have been writing in atomic physics. So I followed the instructions in http://wiki.sagemath.org/SageServer and now I can point the browser of a computer within the institute to the local static ip and I see the sage notebook as expected. The problem is that although I could create a new account, and notebooks, when I type in a cell say: 2+2 the notebook waits a little while and then shows no result. The corresponding message in the notebook terminal is 2015-09-01 14:20:37-0500 [HTTPChannel,13,127.0.0.1] 2015-09-01 14:20:37-0500 [HTTPChannel,13,127.0.0.1] 2015-09-01 14:20:49-0500 [HTTPChannel,8,127.0.0.1] got EOF subprocess must have crashed... 2015-09-01 14:20:49-0500 [HTTPChannel,8,127.0.0.1] 2015-09-01 14:20:49-0500 [HTTPChannel,8,127.0.0.1] Permission denied (publickey,password). what is wrong? Thank you very much! Oscar Lazo. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Re: The sage notebook does not show results
That seems to work without a problem. I even wrote some rich text without problem. I saved and quit the worksheet and when I reopened it, the text was still there. Oscar. 2015-09-01 14:35 GMT-05:00 kcrisman <kcris...@gmail.com>: > I'm cc:ing to sage-notebook as well. Sorry that I can't help but it does > seem to be a permissions thing. What happens if you start a new worksheet > and then just try to save it, or to start a new worksheet, make a *text* > cell change, and then save it? > > > >> Hello Sage people! >> >> I am setting up a sage notebook server at my research institute to >> showcase software I have been writing in atomic physics. So I followed the >> instructions in >> >> http://wiki.sagemath.org/SageServer >> >> and now I can point the browser of a computer within the institute to the >> local static ip and I see the sage notebook as expected. The problem is >> that although I could create a new account, and notebooks, when I type in a >> cell say: >> >> 2+2 >> >> the notebook waits a little while and then shows no result. The >> corresponding message in the notebook terminal is >> >> 2015-09-01 14:20:37-0500 [HTTPChannel,13,127.0.0.1] >> 2015-09-01 14:20:37-0500 [HTTPChannel,13,127.0.0.1] >> 2015-09-01 14:20:49-0500 [HTTPChannel,8,127.0.0.1] got EOF subprocess >> must have crashed... >> 2015-09-01 14:20:49-0500 [HTTPChannel,8,127.0.0.1] >> 2015-09-01 14:20:49-0500 [HTTPChannel,8,127.0.0.1] Permission denied >> (publickey,password). >> >> what is wrong? >> >> Thank you very much! >> >> Oscar Lazo. >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "sage-support" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/sage-support/I4uk2EbO6q4/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > sage-support+unsubscr...@googlegroups.com. > To post to this group, send email to sage-support@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-support. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Strange characters in sage terminal
Hi! I used to see some straight lines when I started the sage command-line (the ones surrounding the header), but now I see some question marks of the kind you see when your system doesn't recognize some character. What do you think I'm missing? I have an Ubuntu system. http://i.imgur.com/NItMB21.png Thank you! Oscar Lazo -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Strange characters in sage terminal
Yes, I ran uxterm and I still see strange characters there. Any ideas? Thank you, Oscar. El lunes, 18 de agosto de 2014 14:41:42 UTC-5, Dima Pasechnik escribió: On 2014-08-18, Oscar Lazo algebra...@gmail.com javascript: wrote: --=_Part_1633_1643381375.1408388447844 Content-Type: text/plain; charset=UTF-8 Hi! I used to see some straight lines when I started the sage command-line (the ones surrounding the header), but now I see some question marks of the kind you see when your system doesn't recognize some character. What do you think I'm missing? I have an Ubuntu system. probably your terminal is not UTF-8 - aware. (these symbols are from UTF-8, not just ASCII) Try opening uxterm and running Sage there. If you still see these, this would indicate weird locale settings... http://i.imgur.com/NItMB21.png Thank you! Oscar Lazo -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Sage giving wrong answer to simple question.
Well, the limit of your expression as x goes to 3 does exist. Oscar. El lunes, 18 de agosto de 2014 15:07:47 UTC-5, Ron Bannon escribió: solve( (x^2-9)/(x-3) = 0, x) should yield x = -3, x neq 3, but Sage just gives x = -3. Any thoughts? -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: configuring tachyon's camera center
Thank you! that was exactly what I needed.
Oscar.
El jueves, 1 de agosto de 2013 18:55:38 UTC-5, Nils Bruin escribió:
On Wednesday, July 31, 2013 4:09:45 PM UTC-7, Oscar Lazo wrote:
Hello dear sage users!
I would like to view a 3d plot from a specific viewpoint using tachyon.
It requires a bit of surgery. Presently, viewpoint and direction are not
part of the configurable scenery parameters (and they clearly should be).
The just get hard-wired into the input to tachyon. You can intercept the
scenery string, however, and edit it to your liking before sending it to
the raytracer:
var('s')
spiral=parametric_plot3d((cos(s),sin(s),s/8),
(s,-16*pi,16*pi),aspect_ratio=1,plot_points=200)
S=spiral.tachyon()
S=S.replace('center 2.3 2.4 2.0','center 0.0 0.0 0.0')
S=S.replace('viewdir -2.3 -2.4 -2.0','viewdir 0.0 1.0 1.0')
tachyon_rt(S)
in the notebook, this now just displays. From the command line, you'd have
to view the just produced `sage.png`.
Be careful. for non-standard viewing directions, you may have to add some
backdrop planes to avoid looking into a big black abyss.
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[sage-support] Re: configuring tachyon's camera center
Is there some way to change the opening angle of the camera? As a default
it seems to me that it is 2*atan(1/2), that is little more than 53 degrees,
but that is too little for my purposes.
Oscar.
El jueves, 1 de agosto de 2013 18:55:38 UTC-5, Nils Bruin escribió:
On Wednesday, July 31, 2013 4:09:45 PM UTC-7, Oscar Lazo wrote:
Hello dear sage users!
I would like to view a 3d plot from a specific viewpoint using tachyon.
It requires a bit of surgery. Presently, viewpoint and direction are not
part of the configurable scenery parameters (and they clearly should be).
The just get hard-wired into the input to tachyon. You can intercept the
scenery string, however, and edit it to your liking before sending it to
the raytracer:
var('s')
spiral=parametric_plot3d((cos(s),sin(s),s/8),
(s,-16*pi,16*pi),aspect_ratio=1,plot_points=200)
S=spiral.tachyon()
S=S.replace('center 2.3 2.4 2.0','center 0.0 0.0 0.0')
S=S.replace('viewdir -2.3 -2.4 -2.0','viewdir 0.0 1.0 1.0')
tachyon_rt(S)
in the notebook, this now just displays. From the command line, you'd have
to view the just produced `sage.png`.
Be careful. for non-standard viewing directions, you may have to add some
backdrop planes to avoid looking into a big black abyss.
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[sage-support] configuring tachyon's camera center
Hello dear sage users!
I would like to view a 3d plot from a specific viewpoint using tachyon.
For instance
save: var('s')
sage: spiral=parametric_plot3d((cos(s),sin(s),s/8),
(s,-16*pi,16*pi),aspect_ratio=1,plot_points=200)
sage: show(spiral, viewer='tachyon')
shows me a spiral from some default viewpoint. However i would like to
view it from inside that is setting the camera center in (0,0,0)
viewing towards (0,0,1). Is this posible?
Using tachyon with something like
sage: t = Tachyon(xres=512,yres=512, camera_center=(0,0,0),
look_at=(0,0,1), raydepth=4)
doesn't allow me to use parametric_plot3d or any other of sage's nice
plotting functions as far as I can see.
Thanks!
Oscar
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[sage-support] java plugin for JMOL
Hello, I have just upgraded my ubuntu distribution, and JMOL has stopped working for me. It gives me the familiar yellow square advising to install java and allow firefox to use it. I've done: $ sudo apt-get install sun-java6-jre sun-java6-plugin ... sun-java6-jre is already the newest version. sun-java6-plugin is already the newest version. ... To no avail, I still get the same yellow box. I also tried to check whether firefox might be blocking the plugin, but the options only include allowing/disallowing javascript. Please help! Oscar. -- -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Changing the latex representation of the output of derivative.
Done:
http://trac.sagemath.org/sage_trac/ticket/12455
I've added a patch, which should do the job, but it has a few
shortcomings:
1.-The resulting symbolic functions seem to remain on hold:
sage: airy_ai(1.0)
airy_ai(1.00)
You need to force it to evaluate:
sage: airy_ai(1.0).n()
0.135292416313
2.- This doesn't work:
sage: airy_ai(2.0).n(digits=100)
0.0349241304233
3.- There is no evaluation for airy_ai_prime or airy_bi_prime
4.- I'm not sure about how should the functions be called, some
possible schemes are
{ai,bi,aip,bip} {ai,bai,aip,baip}
{airy_ai,airy_bi,airy_ai_prime,airy_bi_prime}
And also whether the latex representation should be capitalized or
not. I chose the third scheme, and capitalized typesetting.
Cheers!
Oscar
On 6 feb, 19:37, kcrisman kcris...@gmail.com wrote:
On Feb 6, 4:22 pm, Oscar Lazo algebraicame...@gmail.com wrote:
That worked excelent! I made the following code:
from sage.symbolic.function import BuiltinFunction
class AiryAi(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, ai,
latex_name=r\operatorname{Ai})
def _derivative_(self, x, diff_param=None): return aip(x)
class AiryAiPrime(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, aip,
latex_name=r\operatorname{Ai}')
class AiryBi(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, bi,
latex_name=r\operatorname{Bi})
def _derivative_(self, x, diff_param=None): return bip(x)
class AiryBiPrime(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, bip,
latex_name=r\operatorname{Bi}')
ai=AiryAi()
bi=AiryBi()
aip=AiryAiPrime()
bip=AiryBiPrime()
ai(x)+bi(x)+aip(x)+bip(x)
And now stuff like
f=A1*ai(k*x)+B1*bi(k*x)
f
diff(f,x).subs(x=x0)
works exactly the way I wanted.
Thank you!
Great!
Oscar, you have a Trac account, right? Would you mind opening up a
ticket to make these functions symbolic, put your code up as a
protopatch, add the ticket to an appropriate place
onhttp://trac.sagemath.org/sage_trac/wiki/symbolics/functions, and cc:
users kcrisman, burcin, and benjaminfjones on the ticket?Since we
have robust numerical evaluation for this, we might as well add them
in this way.
Thanks!
- kcrisman
On 6 feb, 19:37, kcrisman kcris...@gmail.com wrote:
On Feb 6, 4:22 pm, Oscar Lazo algebraicame...@gmail.com wrote:
That worked excelent! I made the following code:
from sage.symbolic.function import BuiltinFunction
class AiryAi(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, ai,
latex_name=r\operatorname{Ai})
def _derivative_(self, x, diff_param=None): return aip(x)
class AiryAiPrime(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, aip,
latex_name=r\operatorname{Ai}')
class AiryBi(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, bi,
latex_name=r\operatorname{Bi})
def _derivative_(self, x, diff_param=None): return bip(x)
class AiryBiPrime(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, bip,
latex_name=r\operatorname{Bi}')
ai=AiryAi()
bi=AiryBi()
aip=AiryAiPrime()
bip=AiryBiPrime()
ai(x)+bi(x)+aip(x)+bip(x)
And now stuff like
f=A1*ai(k*x)+B1*bi(k*x)
f
diff(f,x).subs(x=x0)
works exactly the way I wanted.
Thank you!
Great!
Oscar, you have a Trac account, right? Would you mind opening up a
ticket to make these functions symbolic, put your code up as a
protopatch, add the ticket to an appropriate place
onhttp://trac.sagemath.org/sage_trac/wiki/symbolics/functions, and cc:
users kcrisman, burcin, and benjaminfjones on the ticket? Since we
have robust numerical evaluation for this, we might as well add them
in this way.
Thanks!
- kcrisman
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[sage-support] Re: Changing the latex representation of the output of derivative.
On 7 feb, 04:48, Burcin Erocal bur...@erocal.org wrote: You need to add an _eval_() function which calls _evalf_() if the argument is not exact. See this patch for an example: http://trac.sagemath.org/sage_trac/attachment/ticket/4498/trac_4498-s... Done :) The _evalf_() function in your patch hard codes RDF. You need to do something like this: sage: from sage.libs.mpmath import utils as mpmath_utils sage: import mpmath sage: mpmath_utils.call(mpmath.airyai, 1, parent=RR) 0.135292416312881 mpmath seems to be around 35 times faster than the RDF version, (which was the way things were done before my patch). I don't think we want to have separate functions for the derivatives in Sage. These might help you get around the printing problem for now, but they are not useful in general. I disagree here, Mathematica has got the AiryAiPrime function. And mpmath supports calculating derivatives and integrals of arbitrary order! I think it would be best if we could do something like: sage: airy_ai(x) airy_ai(x) sage: airy_ai(x,1) airy_ai_prime(x) sage: airy_ai(x,-2) airy_ai(x,-2) that is, make a single object that returns arbitrary derivatives or integrals. Cheers! Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Changing the latex representation of the output of derivative.
On second thought, I think it would be better to use the airy equation to calculate derivatives or order higher than 1. Like sage: airy_ai(2,x) x*airy_ai(x) sage: airy_ai(3,x) airy_ai(x)+x*airy_ai_prime(x) sage: diff(airy_ai(x),x,2) x*airy_ai(x) sage: diff(airy_ai(x),x,3) airy_ai(x)+x*airy_ai_prime(x) which is very likey to be the way mpmath calculates higher order derivatives. Integrals however, would be returned as: sage: airy_ai(-1,x) airy_ai(-1,x) sage: integral(airy_ai(x),x) airy_ai(-1,x) what do you think? Oscar On 7 feb, 09:15, Burcin Erocal bur...@erocal.org wrote: On Tue, 7 Feb 2012 06:56:30 -0800 (PST) Oscar Lazo algebraicame...@gmail.com wrote: On 7 feb, 04:48, Burcin Erocal bur...@erocal.org wrote: I don't think we want to have separate functions for the derivatives in Sage. These might help you get around the printing problem for now, but they are not useful in general. I disagree here, Mathematica has got the AiryAiPrime function. And mpmath supports calculating derivatives and integrals of arbitrary order! I think it would be best if we could do something like: sage: airy_ai(x) airy_ai(x) sage: airy_ai(x,1) airy_ai_prime(x) sage: airy_ai(x,-2) airy_ai(x,-2) that is, make a single object that returns arbitrary derivatives or integrals. You're right, I didn't know mpmath supported this. We can have a main function that takes a single argument and another one with two arguments to represent the derivatives. This is similar to how maple implements the airy function: http://www.maplesoft.com/support/help/Maple/view.aspx?path=Airy The implementation would be similar to that of the psi function: http://hg.sagemath.org/sage-main/file/tip/sage/functions/other.py#l810 Note that there are two symbolic functions Function_psi1 and Function_psi2, with a regular python function names psi() that wraps these. You can also put the new functions in a new file sage/functions/airy.py. Cheers, Burcin -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Evaluate quickly a complex expression
That is very nice! Unfortunately I need to evaluate many different expressions quickly, so the copy-paste aproach is not an option. That's why I wrote the fast_complex function. I'll be working in such a general implementation, do you think it's worth getting it into sage, or should fast_float be modified to accept complex expressions? Thanks! Oscar On 3 feb, 08:04, Jason Grout jason-s...@creativetrax.com wrote: On 2/3/12 8:02 AM, Jason Grout wrote: The end result was that the straight Cython version was about 13.6 us, the expanded version (where e**(k*I) were precomputed) was about 9 us. The straight fortran version was 10.2 us, and the expanded fortran version (with the powers of e precomputed) was an amazing 3.26 us! Seehttp://sagenb.org/home/pub/4204/for details Thanks, Jason -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Changing the latex representation of the output of derivative.
Hello
I'm working with Airy functions. Although sage can evaluate
airy_ai(1.0), it cannot form a symbolic expression like:
A*airy_ai(x)+B*airy_bi, which is what i need.
So I decided to define the symbolic functions:
ai=function('ai',x,latex_name='Ai')
bi=function('bi',x,latex_name='Bi')
this way
f=A*airy_ai(x)+B*airy_bi
f
looks nice, but I also need to use their derivatives,
un fortunately, the diff function returns a rather ugly output:
A1*D[0](ai)(x) + B1*D[0](bi)(x)
I can live with that, but I also need to be able to visualize in
typesetted form some complicated expressions involving the derivatives
of Airy functions, so I would very much prefer if diff(ai) would be
typesetted the same way as
aip=function('aip',x,latex_name='Ai\'')
Can this be done?
Thank you!
Oscar
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[sage-support] Re: Changing the latex representation of the output of derivative.
That worked excelent! I made the following code:
from sage.symbolic.function import BuiltinFunction
class AiryAi(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, ai,
latex_name=r\operatorname{Ai})
def _derivative_(self, x, diff_param=None): return aip(x)
class AiryAiPrime(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, aip,
latex_name=r\operatorname{Ai}')
class AiryBi(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, bi,
latex_name=r\operatorname{Bi})
def _derivative_(self, x, diff_param=None): return bip(x)
class AiryBiPrime(BuiltinFunction):
def __init__(self):
BuiltinFunction.__init__(self, bip,
latex_name=r\operatorname{Bi}')
ai=AiryAi()
bi=AiryBi()
aip=AiryAiPrime()
bip=AiryBiPrime()
ai(x)+bi(x)+aip(x)+bip(x)
And now stuff like
f=A1*ai(k*x)+B1*bi(k*x)
f
diff(f,x).subs(x=x0)
works exactly the way I wanted.
Thank you!
Oscar
On 6 feb, 14:32, kcrisman kcris...@gmail.com wrote:
I can live with that, but I also need to be able to visualize in
typesetted form some complicated expressions involving the derivatives
of Airy functions, so I would very much prefer if diff(ai) would be
typesetted the same way as
aip=function('aip',x,latex_name='Ai\'')
Airy functions are in
Maximahttp://maxima.sourceforge.net/docs/manual/en/maxima_15.html#Item_003a...
and
mpmathhttp://docs.sympy.org/0.7.0/modules/mpmath/functions/bessel.html#airyai
so we should be able to make them symbolic and evaluate them and get
derivatives and related integrals nicely.
Seehttp://hg.sagemath.org/sage-main/file/tip/sage/functions/trig.py#l305
for a class definition you could mimic. I don't think there is any
other way to get custom derivatives, not on the fly, and not with
'function'.
Though if there is, that would be very useful! It would be nice to
have something like this work.
sage: F = function('ai',x)
sage: F
ai(x)
sage: G = function('aip',x)
sage: G
aip(x)
sage: F._derivative = G
---
AttributeError: 'sage.symbolic.expression.Expression' object attribute
'_derivative' is read-only
sage: F.__setattr__('_derivative',G)
---
AttributeError: 'sage.symbolic.expression.Expression' object attribute
'_derivative' is read-only
- kcrisman
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[sage-support] f2py throws strange error
Hello I've got this code in fortran: !f90 !f90 ! ALGORITHM 819, COLLECTED ALGORITHMS FROM ACM. ! THIS WORK PUBLISHED IN TRANSACTIONS ON MATHEMATICAL SOFTWARE, ! VOL. 28,NO. 3, September, 2002, P. 325--336. ! Code converted using TO_F90 by Alan Miller ! Date: 2002-11-04 Time: 15:13:16 MODULE AiryFunction IMPLICIT NONE !INTEGER, PARAMETER :: dp = SELECTED_REAL_KIND(12, 60) PRIVATE PUBLIC :: aiz, biz ! COMMON /param1/ pi, pihal REAL , PARAMETER :: pi = 3.1415926535897932385, pihal = 1.5707963267948966192 ! COMMON /param2/ pih3, pisr, a, alf REAL , PARAMETER :: pih3 = 4.71238898038469, pisr = 1.77245385090552 REAL , SAVE :: a, alf ! COMMON /param3/ thet, r, th15, s1, c1, r32 REAL , SAVE :: thet, r, th15, s1, c1, r32 ! COMMON /param4/ facto, th025, s3, c3 REAL , SAVE :: facto, th025, s3, c3 CONTAINS SUBROUTINE aiz(ifun, ifac, x0, y0, gair, gaii, ierro) ! ! COMPUTATION OF THE AIRY FUNCTION AI(Z) OR ITS DERIVATIVE AI'(Z) ! THE CODE USES: ! 1. MACLAURIN SERIES FOR |Y| 3 AND -2.6 X 1.3 (Z=X + I*Y) ! 2. GAUSS-LAGUERRE QUADRATURE FOR |Z| 15 AND WHEN ! MACLAURIN SERIES ARE NOT USED. ! 3. ASYMPTOTIC EXPANSION FOR |Z| 15. ! ! INPUTS: ! IFUN: ! * IFUN=1, THE CODE COMPUTES AI(Z) ! * IFUN=2, THE CODE COMPUTES AI'(Z) ! IFAC: ! * IFAC=1, THE CODE COMPUTES AI(Z) OR AI'(Z) ! * IFAC=2, THE CODE COMPUTES NORMALIZED AI(Z) OR AI'(Z) ! X0: REAL PART OF THE ARGUMENT Z ! Y0: IMAGINARY PART OF THE ARGUMENT Z ! OUTPUTS: ! GAIR: REAL PART OF AI(Z) OR AI'(Z) ! GAII: IMAGINARY PART OF AI(Z) OR AI'(Z) ! IERRO: ERROR FLAG ! * IERRO=0, SUCCESSFUL COMPUTATION ! * IERRO=1, COMPUTATION OUT OF RANGE ! ! ACCURACY: ! 1) SCALED AIRY FUNCTIONS: ! RELATIVE ACCURACY BETTER THAN 10**(-13) EXCEPT CLOSE TO THE ZEROS, ! WHERE 10**(-13) IS THE ABSOLUTE PRECISION. ! GRADUAL LOSS OF PRECISION TAKES PLACE FOR |Z|1000 ! (REACHING 10**(-8) ABSOLUTE ACCURACY FOR |Z| CLOSE TO 10**(6)) ! IN THE CASE OF PHASE(Z) CLOSE TO PI OR -PI. ! 2) UNSCALED AIRY FUNCTIONS: ! THE FUNCTION OVERFLOWS/UNDERFLOWS FOR ! 3/2*|Z|**(3/2) LOG(OVER). ! FOR |Z| 30: ! A) RELATIVE ACCURACY FOR THE MODULUS (EXCEPT AT THE ZEROS) ! BETTER THAN 10**(-13). ! B) ABSOLUTE ACCURACY FOR MIN(R(Z),1/R(Z)) BETTER THAN 10**(-13), ! WHERE R(Z)=REAL(AI)/IMAG(AI) OR R(Z)=REAL(AI')/IMAG(AI'). ! FOR |Z| 30, GRADUAL LOSS OF PRECISION TAKES PLACE AS |Z| INCREASES. !CCC ! AUTHORS: ! AMPARO GIL (U. AUTONOMA DE MADRID, MADRID, SPAIN). ! E-MAIL: amparo@uam.es ! JAVIER SEGURA (U. CARLOS III DE MADRID, MADRID, SPAIN). ! E-MAIL: jseg...@math.uc3m.es ! NICO M. TEMME (CWI, AMSTERDAM, THE NETHERLANDS). ! E-MAIL: nico.te...@cwi.nl ! ! REFERENCES: ! COMPUTING AIRY FUNCTIONS BY NUMERICAL QUADRATURE. ! NUMERICAL ALGORITHMS (2002). ! A. GIL, J. SEGURA, N.M. TEMME ! INTEGER, INTENT(IN) :: ifun INTEGER, INTENT(IN) :: ifac REAL , INTENT(IN) :: x0 REAL , INTENT(IN) :: y0 REAL , INTENT(OUT) :: gair REAL , INTENT(OUT) :: gaii INTEGER, INTENT(OUT) :: ierro REAL :: over, under, dl1, dl2, cover REAL :: f23, pi23, sqrt3, xa, ya, f23r, df1, df2, s11, c11, dex, dre, dima, gar, gai, c, s, u, v, v0, ar, ai, ar1, ai1, ro, coe1, coe2, rex, dfr, dfi, ar11, ai11 INTEGER :: iexpf, iexpf2, n ! COMMON /param1/ pi, pihal ! COMMON /param2/ pih3, pisr, a, alf ! COMMON /param3/ thet, r, th15, s1, c1, r32 ! COMMON /param4/ facto, th025, s3, c3 REAL , PARAMETER :: x(1:25) = (/ .283891417994567679D-1, .170985378860034935D0, .435871678341770460D0, .823518257913030858D0, 1.33452543254227372D0, 1.96968293206435071D0, 2.72998134002859938D0, 3.61662161916100897D0, 4.63102611052654146D0, 5.77485171830547694D0, 7.05000568630218682D0, 8.45866437513237792D0, 10.0032955242749393D0, 11.6866845947722423D0, 13.5119659344693551D0, 15.4826596959377140D0, 17.6027156808069112D0, 19.8765656022785451D0, 22.3091856773962780D0, 24.9061720212974207D0, 27.6738320739497190D0, 30.6192963295084111D0, 33.7506560850239946D0, 37.0771349708391198D0, 40.6093049694341322D0 /) REAL , PARAMETER :: w(1:25) = (/ .143720408803313866D0, .230407559241880881D0, .242253045521327626D0, .203636639103440807D0, .143760630622921410D0, .869128834706078120D-1, .454175001832915883D-1, .206118031206069497D-1, .814278821268606972D-2, .280266075663377634D-2, .840337441621719716D-3, .219303732907765020D-3, .497401659009257760D-4, .978508095920717661D-5, .166542824603725563D-5, .244502736801316287D-6, .308537034236207072D-7, .333296072940112245D-8, .306781892316295828D-9, .239331309885375719D-10, .157294707710054952D-11, .864936011664392267D-13, .394819815638647111D-14, .148271173082850884D-15, .453390377327054458D-17 /) REAL , PARAMETER :: xd(1:25) = (/
[sage-support] Evaluate quickly a complex expression
Hello I've got the following expression: z=(24*K1**2*K2**2*e**(4*I) + (24*K2**2 - 32*I*K2 + 32)*K1**2 + (-48*I*K2**2 - 64*K2 - 64*I)*K1 - ((48*K2**2 - 32*I*K2)*K1**2 - (48*I*K2**2 + 32*K2)*K1)*e**(2*I))*(24*K1**2*K2**2*e**(-4*I) + (24*K2**2 + 32*I*K2 + 32)*K1**2 + (48*I*K2**2 - 64*K2 + 64*I)*K1 - ((48*K2**2 + 32*I*K2)*K1**2 - (-48*I*K2**2 + 32*K2)*K1)*e**(-2*I))/((9*K1**3*K2**3*e**(6*I) - (9*K2**3 - 30*I*K2**2 - 12*K2 - 24*I)*K1**3 + (30*I*K2**3 + 100*K2**2 - 40*I*K2 + 80)*K1**2 + 24*I*K2**3 - ((27*K2**3 - 30*I*K2**2)*K1**3 - (30*I*K2**3 + 28*K2**2)*K1**2)*e**(4*I) + (12*K2**3 - 40*I*K2**2 - 16*K2 - 32*I)*K1 + ((27*K2**3 - 60*I*K2**2 - 12*K2)*K1**3 + (-60*I*K2**3 - 128*K2**2 + 16*I*K2)*K1**2 - (12*K2**3 - 16*I*K2**2 + 16*K2)*K1)*e**(2*I) + 80*K2**2 - 32*I*K2 + 64)*(9*K1**3*K2**3*e**(-6*I) - (9*K2**3 + 30*I*K2**2 - 12*K2 + 24*I)*K1**3 + (-30*I*K2**3 + 100*K2**2 + 40*I*K2 + 80)*K1**2 - 24*I*K2**3 - ((27*K2**3 + 30*I*K2**2)*K1**3 - (-30*I*K2**3 + 28*K2**2)*K1**2)*e**(-4*I) + (12*K2**3 + 40*I*K2**2 - 16*K2 + 32*I)*K1 + ((27*K2**3 + 60*I*K2**2 - 12*K2)*K1**3 + (60*I*K2**3 - 128*K2**2 - 16*I*K2)*K1**2 - (12*K2**3 + 16*I*K2**2 + 16*K2)*K1)*e**(-2*I) + 80*K2**2 + 32*I*K2 + 64)) + (8*K1**2*K2**2*e**(4*I) + (8*K2**2 - 16*I*K2)*K1**2 - ((16*K2**2 - 16*I*K2)*K1**2 + 32*K1*K2)*e**(2*I) + 32*K2**2 - 64*I*K2)*(8*K1**2*K2**2*e**(-4*I) + (8*K2**2 + 16*I*K2)*K1**2 - ((16*K2**2 + 16*I*K2)*K1**2 + 32*K1*K2)*e**(-2*I) + 32*K2**2 + 64*I*K2)/((9*K1**3*K2**3*e**(6*I) - (9*K2**3 - 30*I*K2**2 - 12*K2 - 24*I)*K1**3 + (30*I*K2**3 + 100*K2**2 - 40*I*K2 + 80)*K1**2 + 24*I*K2**3 - ((27*K2**3 - 30*I*K2**2)*K1**3 - (30*I*K2**3 + 28*K2**2)*K1**2)*e**(4*I) + (12*K2**3 - 40*I*K2**2 - 16*K2 - 32*I)*K1 + ((27*K2**3 - 60*I*K2**2 - 12*K2)*K1**3 + (-60*I*K2**3 - 128*K2**2 + 16*I*K2)*K1**2 - (12*K2**3 - 16*I*K2**2 + 16*K2)*K1)*e**(2*I) + 80*K2**2 - 32*I*K2 + 64)*(9*K1**3*K2**3*e**(-6*I) - (9*K2**3 + 30*I*K2**2 - 12*K2 + 24*I)*K1**3 + (-30*I*K2**3 + 100*K2**2 + 40*I*K2 + 80)*K1**2 - 24*I*K2**3 - ((27*K2**3 + 30*I*K2**2)*K1**3 - (-30*I*K2**3 + 28*K2**2)*K1**2)*e**(-4*I) + (12*K2**3 + 40*I*K2**2 - 16*K2 + 32*I)*K1 + ((27*K2**3 + 60*I*K2**2 - 12*K2)*K1**3 + (60*I*K2**3 - 128*K2**2 - 16*I*K2)*K1**2 - (12*K2**3 + 16*I*K2**2 + 16*K2)*K1)*e**(-2*I) + 80*K2**2 + 32*I*K2 + 64)) which depends on K1 and K2. I need to evaluate for many values of K1 and K2. I know it to be real, but doing real(z) takes forever, so I tried using simply z.subs(K1=k1,K2=k2) inside two nested for loops, but that also takes very long. Next I tried to use fast_float, but that won't accept my complex expression. I also tried fast_callable, but it takes even longer than z.subs. So, Is there some way to evaluate fastly a complex expression? thanks! Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Evaluate quickly a complex expression
On 3 feb, 00:45, Simon King simon.k...@uni-jena.de wrote:
Hi Jason,
On 3 Feb., 05:41, Jason Grout jason-s...@creativetrax.com wrote:
...
I would use fast_callable (which for me is 5x faster than subs), ...
Note that the OP stated that he did try fast_callable, and it was
*slower* than z.subs(K1=k1,K2=k2). Perhaps that indicates a bug?
Well, I may be wrong on that one, at this point I don't remember what
the results were
Cheers,
Simon
Thank you all for your suggestions, which seem very good :). I was
away from the internet for most of today, so I couldn't read your
replies until now. I made a function called fast_complex which takes a
symbolic expression, generates the corresponding fortran code, and
compiles it using f2py. It seems fast enough for what I need, though I
wonder whether some of the suggestions here might be better. I'll post
the code:
def fast_complex(expr,name,vars,domain=CC):
varlist=''
for i in vars:
varlist+=str(i)+','
varlist=varlist[:-1]
s='!f90\n'
#s='program programa_x\n'
#s+='implicit none\n'
#s+='end program\n\n'
s+='subroutine '+name+'('+varlist+',output_var)\n'
s+='implicit none\n'
s+='real, intent(in) ::'+varlist
s+='\n'
if domain==RR:
s+='real, intent(out) :: output_var\n'
else:
s+='complex, intent(out) :: output_var\n'
s+='complex :: I,e,z\n'
s+='e=exp(1.0)\n'
s+='I=(0,1)\n'
fun='z='
fun+= str(expr).replace('^','**')
nums=['0','1','2','3','4','5','6','7','8','9','*','(',')']
while True:
maxi=70
while True:
c1=fun[maxi-1:maxi]; c2=fun[maxi:maxi+1]
if (c1 in nums) or (c2 in nums):
maxi-=1
else:
break
s+=fun[:maxi]+'\n'
if len(fun)maxi:
break
fun=fun[maxi:]
s=s[:-2]
s+='\n\n'
if domain==RR:
s+='output_var=real(z)\n'
else:
s+='output_var=z\n'
s+='end subroutine\n'
f=file('/home/oscar/Escritorio/tesis/calculos/ejem.f90','w')
f.write(s)
f.close()
return fortran(s)
I'll try to check this on the weekend, and maybe make a ticket and
patch :)
thank you all!
Oscar
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[sage-support] Elliptic Jacobi functions
Hi Is there some way to calculate elliptic Jacobi functions in sage? http://en.wikipedia.org/wiki/Jacobi_elliptic_function thanks! Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Suse binary doesn't work
Sorry, I forgot to describe what's going on. It's this friend of mine, Luis, who is using Suse now, and wants to run sage. But he gets the error above. Thank you! Oscar. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Can't build ATLAS on Ubuntu 10.04
This is a known bug: http://trac.sagemath.org/sage_trac/ticket/9385 So far we've been unable to explain it... Oscar On Oct 16, 3:09 am, Rodolfo Navarrete rhopark...@gmail.com wrote: Hello, I'm trying to compile Sage 4.5.3 on my HP laptop running Ubuntu 10.04. I have followed the instructions and recommendations on the documentation, I even installed bison. I get this error message when compiling at the tail of the log file: STAGE 2-1-2: CacheEdge DETECTION make -f Makefile INSTALL_LOG/atlas_cacheedge.h pre=d 21 | ./xatlas_tee INSTALL_LOG/dMMCACHEEDGE.LOG make[3]: *** [build] Error 255 make[3]: Leaving directory `/media/Data/Packages/sage-4.5.3/spkg/build/atlas-3.8.3.p14/ATLAS-build' make[2]: *** [build] Error 2 make[2]: Leaving directory `/media/Data/Packages/sage-4.5.3/spkg/build/atlas-3.8.3.p14/ATLAS-build' Failed to build ATLAS. The precompiled binaries seem to work fine, it is the building from source I have problems on. I have attached the complete gigantic log file for reference as a tarball. Thank you for your time, Rodolfo Navarrete install.log.tar.gz 481KViewDownload -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: total differentiation
On Oct 8, 7:54 pm, Nils Bruin nbr...@sfu.ca wrote: If you define x,y,z to be functions of m, it does what you want: sage: var(m) sage: x=function(x,m) sage: y=function(y,m) sage: z=function(z,m) sage: diff(f,m) cos(z(m))*D[0](z)(m) + 2*x(m)*D[0](x)(m) + D[0](y)(m) Yes, but the point of total differentiation is that the parameter m should be arbitrary. We should be able to handdle the differentials without the need to specify with respect to what we are differentiating, for instance: In[1]:= Dt[x y] Out[1]= y Dt[x] + x Dt[y] Before reading your reply I had though it would be easy to implement total differentiation in sage with the stuff we've already got, but on a second thought i don't think sage can express diffrentials by themselves right now... Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: total differentiation
On Oct 9, 2:58 pm, jvkersch joris.vankerscha...@gmail.com wrote:
Hi Oscar,
In Sage 4.6 (currently 4.6alpha2) you will be able to do this using
differential forms:
sage: x, y, z = var('x, y, z')
sage: U = CoordinatePatch((x, y, z))
sage: F = DifferentialForms(U)
sage: f = F(x^2 + y + sin(z)); f
(x^2 + y + sin(z))
sage: g = f.diff(); g
cos(z)*dz + 2*x*dx + dy
sage: g.parent()
Algebra of differential forms in the variables x, y, z
It's only a small step from having d f to obtaining D f.
All the best,
J.
That's great, from your example it seems like it shouldn't be too
difficult to make an analog to mathematicas Dt. I'm not familiarized
with differential forms. I what way is your f=f = F(x^2 + y + sin(z))
different to f(x,y,z) = x^2 + y + sin(z) ?
Oscar
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[sage-support] total differentiation
Hello!
Is there some way to calculate a total differential in sage? I'm
thinking of something that in mathematica would be done like this:
In[1]:= f=x^2+y+Sin[z]
2
Out[1]= x + y + Sin[z]
In[2]:= Dt[f,m]
Out[2]= 2 x Dt[x, m] + Dt[y, m] + Cos[z] Dt[z, m]
In sage I get:
sage: var('x y z m')
sage: f=x^2+y+sin(z)
sage: diff(x,m)
0
My guess is there's no way to do this yet, but I also think It shouldn't
be too hard to implement.
thanks!
Oscar
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[sage-support] Re: wrong model fitting
One last thing, Is there some way to calculate the correlation index
(R^2) of the fit in sage?
thanks!
Oscar
On Aug 29, 12:15 pm, Oscar Lazo estadisticame...@gmail.com wrote:
Thank you very much, that worked perfect. Though I must say I expected
not having to determine the period myself. I thought find_fit would do
that for me. This way all it does is refine my estimate. But thanks
again.
Oscar.
On Aug 29, 2:05 am, Yann yannlaiglecha...@gmail.com wrote:
On Aug 29, 4:50 am, Oscar Gerardo Lazo Arjona
algebraicame...@gmail.com wrote:
Hello!
I have tried to fit some data about an harmonic oscillator to a sine
function, but without success.
Well, the find_fit command does return the values of constants, but they
don't fit the data at all!
I've attatched a worksheet showing this. The first cells are for
retrieving the data from a file, just look at the two plots and how the
fitted function (in red) doesn't match the data at all...
Any ideas?
Thanks
Oscar
Basically, the find_fit function has problems to find a good initial
guess (especially for the period)
You could try to help it.
I can see two ways to do it, using the fact that you expect a sin
function.
First, guess the parameters yourself:
you could look for sign changes to guess the period, this would give
you:
sage: initial_omega = pi.n()/mean(differences([0.5*(data1[i][0]+data1[i
+1][0]) for i in range(len(data1)-1) if data1[i][1]*data1[i+1][1]
0]))
it seems to be enough:
sage:
fit=find_fit(data1,model,parameters=[x0,omega,phi],initial_guess=[1,
omega_i, 1],solution_dict=True); fit
{x0: 0.051021428637755981, phi: -0.021166741696878096, omega:
9.521221611651983}
(nb: you could also find youself better initial guesses for the other
parameters:
x0_i = max([y for x,y in data1])
phi_i = sorted(data1, key=lambda t:abs(t[1]))[0][1]
)
Second possibility, clean the data, it would be a lot easier if we
have only one period:
sage: min(i for i,(x,y) in enumerate(data1) if y*data1[0][1]0) #
first sign change
17
sage: min(i for i,(x,y) in enumerate(data1) if y*data1[0][1]0) #
second sign change
34
sage: data2 = data1[17:34]
sage: fit2=find_fit(data2,model,solution_dict=True); fit2
{x0: 0.05240254787043807, phi: 6.2763562528486139, omega:
9.5651019068351939}
You can even go back to data1:
sage:
fit=find_fit(data1,model,parameters=[x0,omega,phi],initial_guess=[fit2[x0],
fit2[omega], fit2[phi]],solution_dict=True); fit
{x0: 0.051021428642885822, phi: 6.2620185789145335, omega:
9.5212216134899759}
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[sage-support] Re: i need admin rights to sage's ubuntu
In the command line you can give a command with administrative powers by writing sudo before it, for examle sudo mkdir /myfolder will create a folder in the system root (something which requires admin powers). You must be carefull when using sudo, since you could damage your system if you give a bad command. As a principle, don't use it unless you know what the command will do. Oscar On Aug 29, 1:27 am, Seb Taylor pruvit2me...@gmail.com wrote: dear sage (and especially the linux and vm) community, i'm a complete noob to sage, linux, virtual machines, and virtualbox. i was able to get sage up and running on my windows vista laptop with minor diffuculties and now sage is working great. however, i'm looking to add more functionality to the ubuntu OS that Sage is running on itself. VirtualBox comes with a way to enhance linux virtual machine guest OSes through their vbox guest additions software. my problem is when i go to install this software, the OS tells me i need administrative rights and kicks me out. my question is how do i change my rights to the sage's OS itself to adminstrative? from a virtual machine? this seems more like a linux, maybe a vbox or vm, issue to me and i am asking in all the forums i can find. but i think that maybe it's just the special version of the ubuntu os that sage working over? Thanks for all the help in advance! -Seb ps: i don't mind if you explain things to me like a 3-year-old. in fact, i'd prefer it. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Symbolic determinant solution
It would be better if you posted the matrix complete, or if it's a complicated expression, try to simplify it in a way that the error is still produced. It is difficult to imagine what the problem could be with so little information. Oscar On Aug 28, 6:18 am, samrat samluvs...@gmail.com wrote: Hi, I am using sage-4.5.1. I need to symbolically find the determinant of a 4 X 4 matrix. So i do something like: sage: mat = [ [-,-,-,-],[-,-,-,-],[-,-,-,-],[-,-,-,-] ] sage: A = matrix(mat) sage: solve(det(A)==0,c) Here c is one of the given algebraic quantities. The solution has been provided in a book as: c^2 = p - q, where p q are again some algebraic quantities. But sage gives it as c = some algebraic quantity with no square-root sign. So you can see that this removes the possibility of getting comples solutions for c. Even assuming that p q the answer computed appears different. What am i doing wrong? Thanks. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: How can I make implicit_multiplication default?
On Aug 23, 8:54 am, Simon King simon.k...@nuigalway.ie wrote: 1. If you write a little program on the command line and it does something, but simply it doesn't do the right thing or you get strange error messages about missing attributes -- it would be very hard to find out that you forgot to define some object X, so that Sage worked in the wrong assumption that X is a symbolic variable. I strongly prefer to get a clear error message, namely NameError: Name 'X' is not defined or so. That's a good point. Could you give an example of how such confussion might happen? Mathematica uses automatic names, so it would be interesting to see how and if it avoids this sort of thing. Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] How can I make implicit_multiplication default?
implicit_multiplication is very time-saving, and a much more natural way to write things. I'd love it to be default. BTW: I could not post this to ask.sagemath. I click in ask your question and it doesn't get posted. thanks Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: How can I make implicit_multiplication default?
Great! thank you! On Aug 21, 11:50 am, Mike Hansen mhan...@gmail.com wrote: On Sat, Aug 21, 2010 at 9:31 AM, Oscar Lazo estadisticame...@gmail.com wrote: implicit_multiplication is very time-saving, and a much more natural way to write things. I'd love it to be default. In your ~/.sage/init.sage file, add the line implicit_multiplication(True). Whenever you start up Sage, file will be run, turning on implicit multiplication for you. --Mike -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: How can I make implicit_multiplication default?
I have posted a new question now. My impression is that the problem was related to my GoogleID authentification, since I was working with two ID's at the time. On Aug 21, 1:21 pm, Niles nil...@gmail.com wrote: Hi Oscar, Could you tell us a little more about what fails when you try ask.sagemath.org? Do you get any error message? At least one tag is required for every question, so did you include a tag? thanks, Niles On Aug 21, 12:31 pm, Oscar Lazo estadisticame...@gmail.com wrote: implicit_multiplication is very time-saving, and a much more natural way to write things. I'd love it to be default. BTW: I could not post this to ask.sagemath. I click in ask your question and it doesn't get posted. thanks Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: How can I make implicit_multiplication default?
I have now found out about the automatic_names option, that makes variables be automatically declared. Unfortunately this is not available in the command line, so editing ~/.sage/init.sage will not work. Can this too be set as a default? thanks Oscar On Aug 21, 5:56 pm, Oscar Lazo estadisticame...@gmail.com wrote: I have posted a new question now. My impression is that the problem was related to my GoogleID authentification, since I was working with two ID's at the time. On Aug 21, 1:21 pm, Niles nil...@gmail.com wrote: Hi Oscar, Could you tell us a little more about what fails when you try ask.sagemath.org? Do you get any error message? At least one tag is required for every question, so did you include a tag? thanks, Niles On Aug 21, 12:31 pm, Oscar Lazo estadisticame...@gmail.com wrote: implicit_multiplication is very time-saving, and a much more natural way to write things. I'd love it to be default. BTW: I could not post this to ask.sagemath. I click in ask your question and it doesn't get posted. thanks Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Strange bug in latex rendering
BTW, I am using sage 4.4.4. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Strange bug in latex rendering
Errr, now that I think of it I should have sent his to sage-devel. Sorry for the noise, I'll send it there. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Problem with typesetting of help in notebook?
On 16 jul, 09:56, KvS keesvansch...@gmail.com wrote: Dear all, somehow the documentation you get by typing command? in a notebook cell seems messed up (in my case), Sage 4.4.4 on Ubuntu 10.04 with Firefox 3.6.6. Since a screenshot is probably worth a 1000 words, here goes:http://tweakers.net/ext/f/Cv8vuWWbGcYuy6u9IyfmKdWu/full.png. Any hints on what might be going on? Many thanks, Kees I get the same exact bug, I think we've had this bug for some versions already. As a workaround, try using Ctrl ++ to increase you browser resolution. That fixes it. Then you can go back with Ctrl +- and it gets displayed fine in your original resolution. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Jmol does not show graphics
I just noticed the following error appears in the log when i load a jmol plot: java version 1.6.0_18 OpenJDK Runtime Environment (IcedTea6 1.8) (fedora-41.b18.fc13-i386) OpenJDK Server VM (build 14.0-b16, mixed mode) 2010-07-10 13:17:35-0500 [HTTPChannel,6,127.0.0.1] Request error: Connection to the other side was lost in a non-clean fashion. script compiler ERROR: command expected line 1 command 1 of /home/admin/0/cells/19/sage0-size500.jmol? 1278785852: !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01//EN script ERROR: script compiler ERROR: command expected line 1 command 1 of /home/admin/0/cells/19/sage0-size500.jmol? 1278785852: !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01//EN eval ERROR: line 1 command 1: script /home/admin/0/cells/19/sage0-size500.jmol? 1278785852 Ideas? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Notebook appearance: change font and syntax highlighting?
On 7 jul, 16:34, David Sanders dpsand...@gmail.com wrote: Hi, [Using 'Sage Version 4.4.4, Release Date: 2010-06-23' on Kubuntu 10.04] I have just started using Sage, mainly using the notebook interface, which on the whole is excellent and impressive! I started out by trying the new interface Cantor, which is very nice, but I found it to be too unstable, for example it randomly crashed several times when I pressed Tab in the wrong place. But I liked its font, and especially its syntax highlighting. So the question is: is it possible to change the font and to use syntax highlighting in the standard (web browser) notebook interface? I found a few discussions on sage-devel, but they are apparently old (?). It seems to me that this is an important missing feature at the moment (assuming I am not just not finding the correct check box!) Thanks and best wishes, David. There is currently no syntax highlighting in the notebook interface. Although it has been discussed. If you are interested in that feature, you are encouraged to develop it. You will find the Sage community very welcomming, lot's of people will be there to help you. Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: error with integral
Then i don't guess it's my fault it doesn't work. Any thoughts about how to make this work? On 6 mar, 11:42, Oscar Gerardo Lazo Arjona algebraicame...@gmail.com wrote: Hey guys, what's wront with this integral? sage: integral(x^3/(e^x-1),x,0,oo) Traceback (most recent call last): File stdin, line 1, in module File _sage_input_5.py, line 5, in module integral(f,x,_sage_const_0 ,oo) File , line 1, in module File /home/oscar/sage-4.3/local/lib/python2.6/site-packages/sage/misc/functional.py, line 687, in integral return x.integral(*args, **kwds) File expression.pyx, line 6495, in sage.symbolic.expression.Expression.integral (sage/symbolic/expression.cpp:25927) File /home/oscar/sage-4.3/local/lib/python2.6/site-packages/sage/calculus/calculus.py, line 873, in integral return SR(result) File parent.pyx, line 538, in sage.structure.parent.Parent.__call__ (sage/structure/parent.c:4956) File coerce_maps.pyx, line 156, in sage.structure.coerce_maps.NamedConvertMap._call_ (sage/structure/coerce_maps.c:4098) File /home/oscar/sage-4.3/local/lib/python2.6/site-packages/sage/interfaces/maxima.py, line 1758, in _symbolic_ return R(self._sage_()) File /home/oscar/sage-4.3/local/lib/python2.6/site-packages/sage/interfaces/maxima.py, line 1739, in _sage_ return symbolic_expression_from_maxima_string(repr(self)) File /home/oscar/sage-4.3/local/lib/python2.6/site-packages/sage/calculus/calculus.py, line 1937, in symbolic_expression_from_maxima_string raise TypeError, unable to make sense of Maxima expression '%s' in Sage%s TypeError: unable to make sense of Maxima expression 'limit(6*li[4](e^x)-6*x*polylog3(e^x)+3*x^2*polylog2(e^x)+x^3*log(1-e^x)-x^4/4,x,inf)-pi^4/15' in Sage it's an important integral in quantum mechanics, and very difficult for me to solve. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Problem compiling with cython
On 21 feb, 21:50, Oscar Gerardo Lazo Arjona algebraicame...@gmail.com wrote: He is on an amd phenom 965 x4 a 3.4 Ghz processor, and Ubuntu 9.10 64 bits. It turns out it is actually an Intel core 2 dou with ubuntu 9.10 32 bits thanks Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Integer solutions to an equations system
That was was a lot of good feedback! I'll try that thank you all! Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Complex valued functions and parametric_plots
On 30 ene, 14:57, Brian Lins lins.br...@gmail.com wrote: I am running into a problem trying to plot a complex valued function using parametric plots. Oh, I didn't realize this thread, before posting a very similar thing. I do hope this recieves some attention. thanks Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Saving pictures of 3d plots
On 22 ene, 00:51, William Stein wst...@gmail.com wrote: This bug was fixed at the last Sage Days. A fix will appear in some version of Sage in the near future.. Seehttp://trac.sagemath.org/sage_trac/ticket/2872 and maybe send William Cauchois wcauch...@gmail.com, kudos for spending hours fixing this bug. Great! but then, is there a way to choose the viewpoint with tachyon? It would also be good if one could choose the initial viewpoint with jmol... -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: sage keywords
On 12 ene, 21:34, William Stein wst...@gmail.com wrote: On Tue, Jan 12, 2010 at 7:14 PM, Oscar Gerardo Lazo Arjona algebraicame...@gmail.com wrote: wouldn't it be a good idea to hard-code certain mathematical expressions into sage like pi, I , and e as sage additional keywords so that they could not be variable names? Yes. Wow! I was almost sure I would recieve an explanation why that was impossible/a bad idea. :) Sage will soon have a similar mode so that undefined vars magically spring into existence *and* you can call methods using functional notation, which is what that thread linked to above is about. That is great! I do not think any of this should be on by *default*. However, it should be a simple option to turn any/all of this on with an easy short command. Why not? The point is save trouble to the newbies. It is no big difference if instead of telling them be careful not to use e as a variable you tell them if you're going to use e as a variable, then use X option -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: list_plot3d (?)
On 25 dic, 20:13, William Stein wst...@gmail.com wrote: Hi guys... Contribute stuff to sage! This is your big chance to become Sage developers :-) I'll publish it if you think that's a good idea. I might start tomorrow. BTW, I'd also like to use splines or some other smoothing technique. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: list_plot3d (?)
I've found the same problem. What i did is write a program that returns lines between nearest-neighbors. But you have to point out the begining of the curve for it not to make a closed curve. Also, it has problems with connex? cuves (an 8-shaped curve for instance). -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] can't run *.sage scripts from command line
Hello, I've compiled sage 4.1.1, and it seems to work nicely. However, I can't run *.sage scripts from the command line. I've made a file named test.sage with the following content: print Hello World print 8^3 and run sage test.sage and get the following error: 'import site' failed; use -v for traceback Traceback (most recent call last): File demo.py, line 2, in module from sage.all_cmdline import * # import sage library ImportError: No module named sage.all_cmdline _ Comparte tus recuerdos en línea con quien tú desees. http://www.microsoft.com/mexico/windows/windowslive/products/photos-share.aspx?tab=1 --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] jmol bug
I found this bug in jmol. I tried to run this:
u=var('u')
r1=parametric_plot3d((0.707106781187*(u-0)+0.5,0.707106781187*(u-0)+0.866025403784,0.0*(u-0)+6.12303176911e-17),(u,0,1.57009245868e-16))
(r1).show(aspect_ratio=(1,1,1))
which is plotting points accross a straight line, through a very small interval
(u,0,1.57009245868e-16). This throws an error:
corners = self.corners(max_len=255) # hardcoded limit in jmol
ZeroDivisionError: float division
The command will work for:
parametric_plot3d((0.707106781187*(u/e+16-0)+0.5,0.707106781187*(u/e+16-0)+0.866025403784,0.0*(u/e+16-0)+6.12303176911e-17),(u,0,1.57009245868))
which is exactly the same thing
the original version also works with tachyon
_
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