From: Marco on
Hello Forum,

I wrote the following short code:

[X Y Z] = meshgrid(1:60,1:60, 1:60);
alp=(120*pi/180);
bet=(240*pi/180);
tt=cos(alp);
pp=sin(alp);
mm=cos(bet);
nn=sin(bet);

V =cos(X)+ cos( (tt*X)+ (pp*Y))+2*cos((mm*X)+(nn*Y));

It is three plane waves that interfere: 1 goes along the x-directions and the other two go at 120 and 240 degrees with respect to the one going in the x-direction....

I am trying to plot, on the 3D cube given by X,Y,Z, only those values that are equal to zero....How would I do that?

thanks
M