[sage-support] is animate so slow?

2010-07-25 Thread Maurizio
hi all, I was trying to animate a plot, with only few frames (50). I get a very slow animate: from numpy import linspace t_vec = linspace(0,Tn,50) L = Graphics() v = [] tp = [] Xp = [] Yp = [] for tn in t_vec: tp.append(tn) Xp.append(X.subs(val_dict).subs(t = tn)) Yp.append(Y.subs(val_

[sage-support] Re: evaluating numerically a function expression

2010-07-25 Thread Maurizio
is there any form of pattern matching in sage? that should be the basic tool to do something like you mentioned, is it correct? Maurizio On 25 Lug, 11:35, Renato wrote: > On Sat, 24 Jul 2010 11:03:45 -0700 > > > > Jason Grout wrote: > > On 7/24/10 4:38 AM, Renato wrote: > > > Hi, this seems ver

[sage-support] stein-wakins database iter_levels

2010-07-25 Thread gagan
the command iter_levels does not read the last line of the file I even tried s = SteinWatkinsAllData(0); L=s.__getslice__(5,9);L; this gives not output, where as s = SteinWatkinsAllData(0); L=s.__getslice__(5,7);L; gives the correct output/ Currently I was running the following

[sage-support] building sage 4.5.1 on macos

2010-07-25 Thread LĂ©onard JELOAICA
Hello, I am trying to build sage 4.5.1 from source on my MacBook Pro, OS Leopard 10.6.4. The compilation stops with an error at "singular" package, does anyone has a clue about that ? Thank you in advance your help. Leonard Finished installing sagenb-0.8.1.spkg /Users/Leo/Downloads/sage-4.5.1

Re: [sage-support] Re: Problem solving system of ODEs

2010-07-25 Thread Richard
Hello, On 07/23/2010 04:41 AM, kcrisman wrote: > Thanks for this explicit example. I think that what is happening is > that we are providing a list to the Maxima function "atvalue" (the > 'X(t) is just an unevaluated function X(t)), which Maxima wouldn't > like, perhaps. [...] > But I'm not sure

[sage-support] Does sage have support for category theory?

2010-07-25 Thread Alec Battles
I've tried to find info on this. Sorry if it's already been written down. Alec -- 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.googl

Re: [sage-support] Re: evaluating numerically a function expression

2010-07-25 Thread Renato
On Sat, 24 Jul 2010 11:03:45 -0700 Jason Grout wrote: > On 7/24/10 4:38 AM, Renato wrote: > > Hi, this seems very basic, but I wasn't able to figure it out. > > Let's say I have a function: > > > > sage: f(t) > > -4*(5*sqrt(2)*cos(1/2*sqrt(2)*sqrt(5)) - > > 2*sqrt(5)*sin(1/2*sqrt(2)*sqrt(5)))*sin

[sage-support] Define an action

2010-07-25 Thread drenwal
Hello, I would like to define an action, let us say: def Ac(Y,k): return k.transpose()*Y*k where Y and k are square matrices of the same size. But, I would prefer to use a more mathematical notation, like Y[k] or y...@k or whatever non already used symbol instead of Ac(y,k). How is it poss