Gradient of L2-norm using dlgradient

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reza
reza 2022-10-26
编辑： Matt J 2022-10-26
Is it possible to compute the gradient of n = norm(X,"fro") using dlgradient() ?
function y = f(x,theta)
y = norm(x-theta, "fro");
end
function [y, dy] = fun_and_deriv(x,theta)
y = f(x,theta);
dy = dlgradient(y,theta);
end

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Matt J
Matt J 2022-10-26
编辑：Matt J 2022-10-26
Why do that, when the gradient is analytically known?
function [y, dy] = fun_and_deriv(x,theta)
delta=theta-x;
y = norm(delta, "fro");
dy = delta./y;
end

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