[sage-support] Re: Polynomial input as product of factors without * between them

2011-03-25 Thread John H Palmieri
On Friday, March 25, 2011 9:35:13 PM UTC-7, Surendran Karippadath wrote: > > If the multiplication sign * is absent ( say by mistake!) what is SAGE > evaluating? > For example: > x=var('x');f=1/((x-1)(x-3)); > f.limit(x=1) returns -1/3 > diff(f,x) returns -1/(x - 4)^2 > plot(f,(x,0,10)) plo

[sage-support] Polynomial input as product of factors without * between them

2011-03-25 Thread Surendran Karippadath
If the multiplication sign * is absent ( say by mistake!) what is SAGE evaluating? For example: x=var('x');f=1/((x-1)(x-3)); f.limit(x=1) returns -1/3 diff(f,x) returns -1/(x - 4)^2 plot(f,(x,0,10)) plots a smooth curve going through -1/3. It is clear it is evaluating f =1/(x-4). How? Why is not p

[sage-support] Re: latex() returns wrong code

2011-03-25 Thread kcrisman
On Mar 25, 9:45 pm, "andres.ordonez" wrote: > Hi, I checked the FAQ in the sage documentation page, but didn't find > where should I post a bug that I've found. So I'll post it here. If > this isn't the right place, please move it to the right place or let > me know where's the right place and I

[sage-support] Re: Substitute vectors into a symbolic equation

2011-03-25 Thread kcrisman
On Mar 25, 9:59 pm, ancienthart wrote: > Hi guys, back again. > It seems that I can never find what I look for in the reference documents, > but it always becomes embarrassingly easy once someone explains it to me. > > I've been playing around with the displacement reaction for viscous drag > ba

[sage-support] Substitute vectors into a symbolic equation

2011-03-25 Thread ancienthart
Hi guys, back again. It seems that I can never find what I look for in the reference documents, but it always becomes embarrassingly easy once someone explains it to me. I've been playing around with the displacement reaction for viscous drag ballistics, and have derived the following equation:

[sage-support] latex() returns wrong code

2011-03-25 Thread andres.ordonez
Hi, I checked the FAQ in the sage documentation page, but didn't find where should I post a bug that I've found. So I'll post it here. If this isn't the right place, please move it to the right place or let me know where's the right place and I'll move it myself. I found this error. sage: a_0, Z

[sage-support] latex() returns wrong code

2011-03-25 Thread andres.ordonez
Hi, I checked the FAQ in the sage documentation page, but didn't find where should I post a bug that I've found. So I'll post it here. If this isn't the right place, please move it to the right place or let me know where's the right place and I'll move it myself. I found this error. sage: a_0, Z

[sage-support] Re: exp(I*x) --> cos(x)+I*sin(x)

2011-03-25 Thread Dmitry Shkirmanov
> >      return (t.real_part()+I*t.imag_part()).simplify_trig() > Thank you very much, i works. -- 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 ht

Re: [sage-support] function output to list

2011-03-25 Thread Alastair Irving
On 25/03/2011 13:15, clodemil wrote: Hi all, Here is a list: mesures=[[172,91,57],[181,88,58],[146,88,56],[191,85,59],[171,92,50], [157,93,55],[180,84,48],[142,77,60],[169,80,45],[162,76,59], [167,104,73],[166,81,53],[145,78,59],[163,98,58],[192,90,50], [184,85,60],[151,77,56]] # [[P systolic,P

[sage-support] function output to list

2011-03-25 Thread clodemil
Hi all, Here is a list: mesures=[[172,91,57],[181,88,58],[146,88,56],[191,85,59],[171,92,50], [157,93,55],[180,84,48],[142,77,60],[169,80,45],[162,76,59], [167,104,73],[166,81,53],[145,78,59],[163,98,58],[192,90,50], [184,85,60],[151,77,56]] # [[P systolic,P diastolic,Pulse rate]] and a function

[sage-support] Re: Plot order in Graphics() object

2011-03-25 Thread Jason Grout
On 3/25/11 3:02 AM, Jeroen Demeyer wrote: Hello sage-support, Is there way to change the *order* that objects from a Graphics object are plotted (i.e. the Z-order)? Consider the following code in the notebook for a 2D plot:: p1 = plot(sin, 0, 10, thickness=10, color='green') p2 = polygon([(0,0

[sage-support] Plot order in Graphics() object

2011-03-25 Thread Jeroen Demeyer
Hello sage-support, Is there way to change the *order* that objects from a Graphics object are plotted (i.e. the Z-order)? Consider the following code in the notebook for a 2D plot:: p1 = plot(sin, 0, 10, thickness=10, color='green') p2 = polygon([(0,0), (10,0), (10,1), (0,1)], color='gray') p3

Re: [sage-support] exp(I*x) --> cos(x)+I*sin(x)

2011-03-25 Thread Laurent
How i can exp(I*x) --> cos(x)+I*sin(x) ? I wrote the following for personnal use : def ThisIsEulerFormula(t): """ Return t, but in a simplified form. We force Sage to see that exp(ix) is equal to cos(x)+i*sin(x) and then to simplify the trigonometric expressions. INP

[sage-support] exp(I*x) --> cos(x)+I*sin(x)

2011-03-25 Thread Dmitry Shkirmanov
Hello, list, i need a function that can exp(I*x) --> cos(x)+I*sin(x) At http://wiki.sagemath.org/symbolics/rewrite i found the rewrite function. But this function is not mentioned in Sage reference manual, and Sage 4.6.2 does not know this function: NameError: name 'rewrite' is not defined How i ca