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Conditional in values of a matrix

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Montserrat Vallcorba Martí
评论： Star Strider 2017-12-1
Hi,
I want to do the following condition in a matrix:
The example:
Any suggestion?
Thank you!

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采纳的回答

KL
KL 2017-11-30
indx = A(:,2)<0;
B = indx.*A(:,2) + ~indx.*(A(:,2)-A(:,3).*abs(A(:,2)))

更多回答（1 个）

Star Strider
Star Strider 2017-11-30
Your original description of the problem contains an error.
In order to get ‘Vector B’, you need to divide ‘abs(A(i,3))’ by 100.
This works, and gives the correct result:
A = [0.08 -0.335 75; 0.017 -0.335 75; 7.17 0.468 38.5; 19.33 1.379 29; 150 3.73 20];
B = A(:,2)-A(:,3).*abs(A(:,2))/100;
B(A(:,2)<0) = A(A(:,2)<0,2)
B =
-0.3350
-0.3350
0.2878
0.9791
2.9840

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