Gradient of Substituted Symbolic Variables
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Hello, I'm having a problem with finding the gradient of a substituted symbolic variable:
My code is:
syms x y z
f = x^2 + x + y^2 - y;
subs(f, y, z)
g = gradient(f, [x, z])
When I run it, the gradient turns out to be [2*x+1, 0]. It doesn't seem to calculate the z variable derivative. Does anyone know why?
Tks
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