Storing indices from a matrix

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shahzer rahman
shahzer rahman 2020-3-2
评论： shahzer rahman 2020-3-2
Hye all. I am relatively new with Matlab. I am modelling a vehicle suspension system right now.
Assume I have a column matrix that has 6 elements. A= [ 1 2 3 -4 6 -2]'
I want to extract the index of the values that are negative, and store all of them as a column matrix or an array 'B'.
Expected result : B= [4 6]
Kindly help.

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采纳的回答

Stephan
Stephan 2020-3-2
编辑：Stephan 2020-3-2
A= [ 1 2 3 -4 6 -2]'
B = find(A<0)
A =
1
2
3
-4
6
-2
B =
4
6

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