On Oct 9, 10:53 pm, Mike Hansen <mhan...@gmail.com> wrote: > On Mon, Oct 4, 2010 at 4:03 PM, jpc <pedrocruzave...@gmail.com> wrote: > > Why does the plot > > plot(k%1,k,0,5) > > For a symbolic variable 'k', k%1 returns an error since the notion of > a symbolic mod operation hasn't been implemented. > > > What can be used instead ? > > You can just delay the application of the mod operation: > > plot(lambda z: z%1.0, 0, 5)
Just to make sure it's clear, Mike is doing sage: plot( lambda k: k%1., (k,0,5)) while the original poster would have had sage: plot( lambda k: k%1, (k,0,5)) verbose 0 (3766: plot.py, generate_plot_points) WARNING: When plotting, failed to evaluate function at 198 points. verbose 0 (3766: plot.py, generate_plot_points) Last error message: 'Cannot convert non-integral float to integer' That is to say, just changing 1 to 1. 'fixes' it because now Sage knows that the modulus isn't an integer, so it can accept non-integer inputs on the other side as well. I guess this isn't technically a bug (or not different from not having the symbolic %), but maybe should the coercion do something with this? - kcrisman -- 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
