Plot surface data which satisfies x/y condition

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leonidas86 2020-5-5

回答： KSSV 2020-5-5

Hello,

I have a function g(x,y). I want to plot the surf data only for areas where condition x + y = 5 is satisfied. How can I do this?

My code so far:

g = matlabFunction(f1);
[x y]=meshgrid(brk,brk);
data = g(x,y);
figure(1)
surf(x,y,data)

KSSV 2020-5-5

x = -10:1:10 ; 
y =  -10:1:10 ;
[X,Y] = meshgrid(x,y) ; 
idx = X+Y==5 ;  
Z = double(idx) ; 
surf(X,Y,Z)
shading interp
colorbar

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