How can I change a square wave into a sign wave with the graph provided?

Hello,

Im trying to turn this square graph into a sign wave. Any thoughts on how I would go about doing that? The graph provided is how it looks now but it needs to be more of a sign wave.

Here is the code Ive made so far:

frequency = 11.4;

phase = 50;

amplitude = 1;

[X,Y]=meshgrid(0:0.001:1,0:0.001:1);

Z = amplitude*sign(sin((2*3.1415*frequency.*X)+(phase)));

surf(X,Y,Z)

shading interp

view(0,90)

colormap gray

axis off

axis square

Answer 1

[Steve Eddins]

Try removing the call to the sign function.