How to take gradient of matrix(21X21 dimension) with respect to a vector of(1X8) dimensions?
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Hello all,
I have a function which is represented in matrix format with 21X21 components. It depends on 8 design variables and I want to calculate the gradient of this function with respect to these 8 design variables. So can somebody guide on how to calculate gradient of 21X21 matrix with respect to 1X8 dimension vector in Matlab? The expected answer is 21X21X8 dimension matrix. Any help in this matter would be appreciated, Thank you in advance,
Sincerely, Nikhil
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Answers (2)
Walter Roberson
on 16 Nov 2015
vars = symvar(YourMatrix);
for K = length(vars) : -1 : 1
MatrixGradient(:,:,K) = gradient(YourMatrix, vars(K));
end
2 Comments
Walter Roberson
on 16 Nov 2015
syms x1 x2
M = [x1 2*(x2)+2;(x1)^2 (x2)^3];
vars = [x1 x2];
for K = length(vars):-1:1
MatrixGrad(:,:,K) = diff(M,vars(K));
end
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