On May 19, 7:41 am, David Joyner <wdjoy...@gmail.com> wrote:
> On Wed, May 19, 2010 at 6:46 AM, Tobias Katz <tobi...@web.de> 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 sage-support@googlegroups.com > > To unsubscribe from this group, send email to > > sage-support+unsubscr...@googlegroups.com > > 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 sage-support@googlegroups.com > To unsubscribe from this group, send email to > sage-support+unsubscr...@googlegroups.com > 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 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
