how to find argmin to this vector

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Murali Krishna AG
Murali Krishna AG 2020-11-24
评论： Murali Krishna AG 2020-11-24
c=argmin f(a,b).where both a,b are M*1 and N*1 column matrices respectively.
How to get a,b for minimum value of f(a,b) from matlab
  2 个评论
James Tursa
James Tursa 2020-11-24
What does it mean to find the minimum value or index of two vectors with different lengths? Can you provide a short example of inputs and desired output?
Murali Krishna AG
Murali Krishna AG 2020-11-24
Eg: Let function f=A^2+B^2+A*B+2*A^2*B
where A,B are known column matrices
Input:A,B
Expect output A,B.
I want to find in which A,B matrices the functiuon f could be minimum

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KSSV
KSSV 2020-11-24
Are you looking for something like this?
Let a,b be your column matrices.
[a,b] = meshgrid(a,b) ; % make them a matrix
F = f(a,b) ; % evaluate your function, use element by element operations in f
[val,idx] = min(F(:)) ;
amin = a(idx) ;
bmin = b(idx) ;
Have a look on fmincon.

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