How can I operate a matrix by a vector?

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Jerson García
Jerson García 2021-9-25
回答： KSSV 2021-9-26
Hi, I need nelp.
I need to perform the following function f (x) = || Ax - b || ^ 2
A = [2 3, 1-2, 4 1];
b = [2,4, -5];
syms x1 x2
x = [x1 x2];
(sqrt ((A * x-b) ^ 2)) ^ 2

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KSSV
KSSV 2021-9-26
Ran in:
A = [2 3 ; 1 -2 ; 4 1];
b = [2,4, -5]';
syms x1 x2
x = [x1 ; x2];
f = (sqrt ((A * x-b) .^ 2)) .^ 2
f = 

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