New matrix with only the negative numbers of another one

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Ifigenia Aslanidou 2021-9-10

评论： Ifigenia Aslanidou 2021-9-12

采纳的回答： DGM

Hello everyone,

say I have a matrix with positive and negative numbers,e.g A= [-1 ; -2 ; 6 ; -4 ; 5 ; 10; -22; 4];

How do I create a new matrix with only the positive/negative numbers of the matrix above? e.g A_neg=[-1;-2;-4;-22];

I know that with the find command I can find in which row/column these are, but I am not sure how to create another one.

Thanks in advance!

Greetings

DGM 2021-9-10

A = [-1 ; -2 ; 6 ; -4 ; 5 ; 10; -22; 4];
B = A(A<0)
B = 4×1
    -1
    -2
    -4
   -22

Great, thanks!

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