Matlab 3D graphing (graph slicing)?

How can I "plot the function d=x*y*e^(-sqrt(x^2+y^2+x^2)) along the x=y diagonal"? Do I use the "contourslice" command? How? Thanks.

[Patrick Kalita]

Did you mean d=x*y*e^(-sqrt(x^2+y^2+z^2))? Your original question has two x^2 terms in the sqrt.

Answer 1

[Azzi Abdelmalek]

X=1:10
y=x
z=cos(x+y)  % use your function
Plot3(x,y,z)