Element-By-Element Operations using Matlab
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I wonder how to calculate the following sum using Element-By-Element Operations Matlab:
∑_(i=1)^4(u_i.[min(0,A_i.x-b_i )]^2)
i=1:4
u_i is a scalar
A_i is a (1,4) vector
b_i is a scalar
and
x is a (4,1) vector
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Accepted Answer
More Answers (1)
Biswajit M
on 25 Nov 2013
hope this helps:
u(1)*(min(0,min(A(1,:)))*x-b(1)) .^2+u(2)*(min(0,min(A(2,:)))*x-b(2)) .^2+u(3)*(min(0,min(A(3,:)))*x-b(3)) .^2+u(4)*(min(0,min(A(4,:)))*x-b(4)) .^2
I tried it this way :
clear all; clc
u=[1,2,3,4]; A=[1,2,3,4;5,6,7,8;1,2,3,4;5,6,7,8]; x=[5;6;7;8]; b=[4;5;6;7]; min(0,min(A(1,:)))
u(1)*(min(0,min(A(1,:)))*x-b(1)) .^2+u(2)*(min(0,min(A(2,:)))*x-b(2)) .^2+u(3)*(min(0,min(A(3,:)))*x-b(3)) .^2+u(4)*(min(0,min(A(4,:)))*x-b(4)) .^2
The output comes like:
ans =
370
370
370
370
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