Doubt in plot3d

[Lucio Agostinho Rocha]

Hi,

I'm trying to plot the following function in Scilab:

x=[-1:0.01:1];
y=[-1:0.01:1];
g = x .* sin(4 .* %pi .* x) - y .* sin ( 4 .* %pi .* y + %pi ) + 1;
plot3d(x,y,g)

but nothing is displayed. What i'm doing wrong? Someone could help me? If yes, how can I put a degrade with several colors?

Thanks in advance,

Lucio
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