Derivative of a vector

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Nikolaos Zafirakis
Nikolaos Zafirakis 2019-4-15
回答： Walter Roberson 2019-4-15
I have a vector 3x1 which I multiply by a 3x3 matrix and get a solution (this is all done in a function). I take the resulting 3x1 vector out of the function, then I need to compute the derivative of this vector. Once I find the derivative I can return it to the function.
I tried the diff(x) command but it errors every time does anyone have any suggestions?
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madhan ravi
madhan ravi 2019-4-15
Instead of riddling readers show how your x looks like.

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KSSV
KSSV 2019-4-15
USe gradient

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Walter Roberson
Walter Roberson 2019-4-15
Take the derivative of the elements of the vector. Now each row of the matrix gives the mixing coefficients to combine the three derivatives.
Note that this does not apply if the matrix contains the variable that you are taking the derivative with respect to.

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