On Mon, Aug 15, 2011 at 9:56 AM, linouc <linzhenhua...@gmail.com> wrote: > Hello, Sage groups, I have a problem, please see the example below, I > wonder anyone can help me solve this problem: > > f = Piecewise([[(0,pi/2),-1],[(pi/2,pi),2]]) > a=pi*integrate(f,x,0,pi) > a.show() > b=pi*integrate(sin(x),x,0,pi) > b.show() > integrate(f*sin(x),x,0,pi) >
I'm guessing that your error means that multiplication of a piecewise times a symbolic function has not been implemented: sage: f = Piecewise([[(0,pi/2),-1],[(pi/2,pi),2]]) sage: f*sin(x) --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) > ----------------------------------------------- > The first two integrations are right, but for the last one, I got the > following error message: > > > Traceback (click to the left of this block for traceback) > ... > AttributeError: 'sage.symbolic.expression.Expression' object has no > attribute 'domain' > > -- > 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 > -- 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
