ssion_number = -1
> -> 1447 raise TypeError, x
> 1448 self._session_number = parent._session_number
> 1449
>
> TypeError: Computation failed since Maxima requested additional
> constraints (try the command 'assume(x>0)' before integ
Hello,
there is signal function:
signal = Piecewise([
[(0,5), cos(2*pi*1*x) ],
[(5,10), cos(2*pi*2.5*x) ],
])
And window function:
window = Piecewise([[(-1,1),1]])
And the result function:
r=window*signal
How can I integrate it now? I'am trying:
r.integral(definite=True)
but it leads to error
Hi all!
I am trying to do simple convolution:
x = PolynomialRing(QQ,'x').gen()
f=piecewise([((-1,3),1*x^0)])
g=piecewise([((0,5),exp(-x))])
r=g.convolution(f)
and got this error message:
RuntimeError: Symbolic Ring still using old coercion framework
What is wrong with it?
--~--~-~--~-
Hi all!
I'am trying to use sage on ArchLinux server. There is not enough space
on /home, so i create a directory /ubin/sage and unpack sage in there:
drwxr-xr-x 3 operator users 4.0K 2009-09-14 22:33 sage
then i'am trying to run "make" command, and of this it's output here:
---
f(x)=exp(-x^2)
g=diff(f)
then I'd like to find maximum of g function on interval:
find_maximum_on_interval(g,0,1)
(-1.30156325204e-08, 6.5078162602101728e-09)
but for:
find_maximum_on_interval(g,0,3)
I've got error:
Traceback (click to the left for traceback)
...
TypeError: cannot coerce type ''
Hello,
plot(lambda f:f,0.0003,0.0004)
The graph has only two signed marks on the axes. How can I tell sage
to make more? There are still a lot of free space.
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To unsubscribe f
thank you!
On Jan 9, 7:27 pm, "William Stein" wrote:
> On Fri, Jan 9, 2009 at 3:49 AM, Sand Wraith wrote:
>
> > Hi!
>
> > Is it possible to get order of root of equation? For example equation:
>
> > f(x)=(x+1)^2
> > and it's solutio
Hi!
Is it possible to get order of root of equation? For example equation:
f(x)=(x+1)^2
and it's solution "solve(f,x)" will be "[x == -1]", but this is not
perfect clear, because x==-1 have second order. This equation actually
must have two same roots: [x == -1,x == -1].
--~--~-~--~
Hi all!
How to use both html and graphics?
for example insert plot(sin,0,4) in html-tabe?
i am trying:
html('sin(x):')
html(myimage)
html('')
but it gives table with text "sin: Graphics object consisting of 1
graphics primitive".. i'd like to see image, not text.
Thank you.
--~--~-~-
Hi!
I want to plot a few lines:
Line=line([])
for i in [-10..3]:
Line+=line([[0,0],[1.1+i/10,1.1]])
and show it:
show(Line,xmin=0)
but output contains area below X axis. :-\
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Thank you! Than you all so much!
It was so difficult to continue my research without it! And I am so
glad Sage project have real support :-)
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this
round(H.substitute(f=4).abs(),4)
give same error again...
then this:
round(RDF(H.substitute(f=4).abs()),4)
takes so much time, can't wait...
On Dec 9, 10:42 pm, Sand Wraith <[EMAIL PROTECTED]> wrote:
> you mean for f? this:
>
> round(H.substitute(f=1),4)
>
&
you mean for f? this:
round(H.substitute(f=1),4)
gives type error again :-(
On Dec 9, 9:51 pm, Tim Lahey <[EMAIL PROTECTED]> wrote:
> On Dec 9, 2008, at 1:46 PM, Sand Wraith wrote:
>
>
>
>
>
> > thank you! ))
>
> > but I need to use my values, now ju
"H p Pole1 Pole2 Pole3 Ts z
> f")
> p = (2/Ts)*(z-1)/(z+1)
> z = exp(I*2*pi*Ts*f)
> H = (p^3)/((p-Pole1)*(p-Pole2)*(p-Pole3))
> show(H)
>
> The only difference is that I have declared the variables in the first
> line. Hope that helps.
>
> On Dec 8, 5:58 pm,
Hi all! Please help me to replace variables:
I have this function:
H(p)=(p^3)/((p-Pole1)*(p-Pole2)*(p-Pole3))
where Pole1,Pole2,Pole3 - complex:
r=2*2*pi
Pole1=r*exp(I*2*pi/3)
Pole2=-r
Pole3=r*exp(-I*2*pi/3)
Ts=0.1
And I need to make a few replaces:
need to replace "p" with "(2/Ts)*(z-1)/(z+
Hi all!
Does anyone know any cool extensions for firefox? I know only
ItIsAllText...
For example i'd like to have syntax highlighting? (into the firefox
text areas)
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Hi all!
I am running SAGE Version 3.1.4 on my XUbuntu ( 2.6.27-7-generic #1
SMP Tue Nov 4 19:33:20 UTC 2008 i686 GNU/Linux),
and then executing show("Test") in sage notebook i have this error
message:
>It looks like jsMath failed to set up properly (error code -7). I will try to
>keep going,
So am i wrong? or it is a bug
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Hi!
Here is my problem:
1. Creating a new worksheet,
2. Clicking at "Unnamed" in the title of page and entering new name
"Test & Test: Test"
3. Save&Quit
4. Entering to "Test & Test: Test" worksheet
5. Save&Quit again
6 And name of this worksheet changed to:"Test & Test :
Test"
What is
Thank you )) now its OK
On Sep 21, 5:25 pm, "Timothy Clemans" <[EMAIL PROTECTED]>
wrote:
> Hi,
>
> This and other bugs have been fixed in the latest release, 3.1.2.
>
> Timothy
>
> On Sun, Sep 21, 2008 at 7:23 AM, Sand Wraith <[EMAIL PROTECTED]>
Thank you! :-)
> sage: v = vector(CDF,[1..10]); v
> (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0)
> sage: w = v.fft(); w
> (55.0, -5.0 + 15.3884176859*I, -5.0 + 6.88190960236*I, -5.0 +
> 3.63271264003*I, -5.0 + 1.62459848116*I, -5.0, -5.0 - 1.62459848116*I,
> -5.0 - 3.63271264003*I, -5.0 -
Hi!
Using sage:
SAGE Version 3.1.1, Release Date: 2008-08-17
and can not delete worksheet:
1) select worksheet "test"
2) press "delete"
3) now i can see "test" worksheet in Trash,
4) press "sign out"
5) stop sage
6) launch sage again
7) and now i see "test" worksheet in active section again!
--
Hi all!
Does anyone know where to find guide or example how to use Fourier
transform and inverse Fourier transform in sage?
Thanks.
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> On Mon, Sep 15, 2008 at 11:10 AM, Sand Wraith <[EMAIL PROTECTED]> wrote:
>
> > On Sep 13, 2:35 am, Jason Merrill <[EMAIL PROTECTED]> wrote:
> >> On Sep 12, 4:48 pm, Sand Wraith <[EMAIL PROTECTED]> wrote:
>
> >> > Hi all! Help please again :-)
&
On Sep 13, 2:35 am, Jason Merrill <[EMAIL PROTECTED]> wrote:
> On Sep 12, 4:48 pm, Sand Wraith <[EMAIL PROTECTED]> wrote:
>
> > Hi all! Help please again :-)
>
> > here is worksheet describes my problem:
>
> >http://75.75.6.176/home/pub/8/
>
&g
Hello,
tell please, how to access spline like function? for example i have:
p=list();
p.append([1,1]);
p.append([2,1.5]);
p.append([3,2]);
p.append([4,0]);
s=spline(p)
and i can get value of s in any point: s(1) or s(3) etc.
so, i want to use this spline like function:
g(x)=s(x)+1;
or
def g(x)
Thank you, i shell read more about piecewise, :-)
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Hi all! Help please again :-)
here is worksheet describes my problem:
http://75.75.6.176/home/pub/8/
so, at the last stem i have wrong result: 0 instead of 2/3.
what i am doing wrong?
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On Sep 9, 1:29 am, Jason Merrill <[EMAIL PROTECTED]> wrote:
> On Sep 8, 4:12 pm, Sand Wraith <[EMAIL PROTECTED]> wrote:
>
>
>
> > Hi all!
>
> > I do not know - it is an bug, or my mistake. I am trying to plot sum
> > of a few same functions:
&g
Hi all!
I do not know - it is an bug, or my mistake. I am trying to plot sum
of a few same functions:
This is my function:
B=10*sqrt( pi)/7;
b=pi/7;
c(f)=B*exp(-(b*f)^2);
plot(c(f),(f,-5,5));
in the output i see correct graphic.
Then i have define a function to calculate sum:
def specsum(x,Fd
William Stein wrote:
> On Thu, May 1, 2008 at 8:31 AM, Sand Wraith <[EMAIL PROTECTED]> wrote:
> >
> >
> > Hi! I use notebooks, and for example i want to plot cosine function:
> >
> > plot(cos(x),1,2)
> >
> > in output i see graphic which ha
Hi! I use notebooks, and for example i want to plot cosine function:
plot(cos(x),1,2)
in output i see graphic which have x in range near [-1.5,2.5]. but
there is no information for me when x is in interval [-1.5,1] and
[2,2.5], so i do not want to see it in output graphic.
and another example:
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