For example, I want to plot a $f(y, c)=f(2, c)$ against $c$ where the function $f$ is the integral of $y \cos(c x)\,dx$ from 0 to π,
When I try to do it, I get the message:
NIntegrate::inumr: The integrand Cos[c x] has evaluated to non-numerical values for all sampling points in the region with boundaries {{0,6}}. >>
How cab I make the plot I want? I'm so lost.
Actually my function is
and this is what i want to plot
Plot[EV[4, ξ_, 2, 5, 1], {ξ, 1, 3}]
f[y, c]in Mathematica? $\endgroup$ – J. M. will be back soon♦ Mar 7 '18 at 1:24Plot[EV[4, ξ_, 2, 5, 1], {ξ, 1, 3}]should bePlot[EV[4, ξ, 2, 5, 1], {ξ, 1, 3}]If this change doesn't fix your problem, then you need to post your full code in markdown format (not as an image). $\endgroup$ – m_goldberg Apr 29 '18 at 4:27