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How to program Triagonometric function and give it's Jacobian matrix
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and I've give it's function, now my problem is to solve it's Jacobian Matrix
function y = TrigonometricFunctionN_10(x)
n = 10;
y = [];
for i = 1:n
f = 0;
for j = 1:n
f = f + cos(x(j));
end
y_i = n - f + i*(1 - cos(x(i))) - sin(x(i));
y = [y;y_i];
end
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Walter Roberson
am 2 Mai 2017
By inspection, for all j ~= i, the only term involving xj will be -cos(xj) (occurring during the summation), and the derivative of that is trivial to calculate. For j == i, you get only -cos(xi) - i * cos(xi) - sin(xi) which is also trivial to calculate the derivative of.
The Jacobian will therefore be 0 everywhere except the diagonal, and will be the derivative of -cos(xj) for all terms except diagonal entry i, where it will be the derivative of -(i+1)*cos(xi) - sin(xi)
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