Hi, Indeed I am looking for s.th. like g(t) = convolve(f,sin)
I am not familiar with Maxima - I had a short look at it but I didn't find a function like this. Is the best way to convolve numerically? Does anybody know a way in Maxima or another CAS? Tobias On 05/19/2010 03:11 PM, kcrisman wrote: > > > On May 19, 7:41 am, David Joyner <[email protected]> wrote: >> On Wed, May 19, 2010 at 6:46 AM, Tobias Katz <[email protected]> wrote: >>> Hi, >>> I am trying to use sage for signal analysis and didn't find a solution >>> to perform symbolic convolution. Is there a way to do this? >>> Has anybody done something similar in sage before? >> >> Do you mean this, for example? >> >> sage: x,t = var("x,t") >> sage: assume(t>0) >> sage: f = function("f",x) >> sage: g(t) = integral(f(x)*sin(t-x),x,0,t) >> sage: g >> t |--> -integrate(sin(-t + x)*f(x), x, 0, t) >> > > > But perhaps the OP wishes functionality like > > sage: g(t) = convolve(f,sin) # doesn't exist! > > which I've wanted to implement for a long time for arithmetic > functions, but haven't quite figured out how to get Python to do > consistently for some reason (it being low on the priority list). > > Does Maxima have a convolution? > > - kcrisman > > >>> Is there a way to work with the sine integral? >>> I tried to get it by integrating a sinc-function but I didn't get >>> anything usable. >> >>> Would be great if anybody could give me a hint. >> >>> Thanks, >>> Tobias >> >>> -- >>> To post to this group, send email to [email protected] >>> To unsubscribe from this group, send email to >>> [email protected] >>> For more options, visit this group >>> athttp://groups.google.com/group/sage-support >>> URL:http://www.sagemath.org >> >> -- >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected] >> For more options, visit this group >> athttp://groups.google.com/group/sage-support >> URL:http://www.sagemath.org > -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
