Why Surface Plot is Black?

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Mahmoud Baniasadi
评论： Walter Roberson 2019-11-10
Hi I have a simple code as bellow. why the surface plot is black?
mi_x=3.75;
mi_y=113.75;
si_x=11.78511;
si_y=250.2842;
cor_coef=0.964811;
fxy1=(1/(2*pi*si_x*si_y*sqrt(1-cor_coef^2)));
exp1=-1/(2-2*cor_coef^2);
[x,y] = meshgrid(0:50,0:975);
exp2=(((x-mi_x)/si_x).^2-2.*cor_coef*(x-mi_x).*(y-mi_y)/si_x/si_y+((y-mi_y)/si_y).^2);
fxy=fxy1.*exp(exp1.*exp2);
surf(x,y,fxy);
Why Plot is black!! I tried codes in help, but it didn't work for me !
Thanks

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Walter Roberson
Walter Roberson 2016-2-1
Change to
surf(x, y, fxy, 'edgecolor', 'none');
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maaham banu
maaham banu 2019-11-4
Hi it's not working for me.
Walter Roberson
Walter Roberson 2019-11-10
maaham banu could you confirm that you are getting a surface output, and that you used edgecolor none, but that the surface is all black? If so is it possible that your colormap is all black, or that you have a caxis() call in effect?

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