I need help with the error below. I'm trying to create a few 3-D plots based on the description below. My code is included.
Given function f(x,y) = x^2 + y-sin(xy), draw 3-D graph of contour, plot3, mesh, surface on the intervals x [-2*pi,2*pi] and y[-2*pi; 2*pi].
Thanks in advance!
y = -2*pi,2*pi
[X,Y] = meshgrid ([-2*pi,2*pi], [-2*pi,2*pi])
>>Warning: Contour not rendered for constant ZData
> In contour (line 51)