How to return the element in a vector satisfying some condition?(without 'if')

Question

I want to get A'=[1 0 3 0]' from A=[1 10 3 100]' from the below MATLAB code

new_A=A(A<10)

But it does not work.

I need to do this without for or if.

What language are you using? That would be a helpful detail to add. — Matt Jacob
– Matt Jacob, Commented Oct 20, 2015 at 5:54

matz · Accepted Answer · 2015-10-20 08:29:19Z

5

(A < 10) is a binary matrix of the same size as A. Thus this should do the job:

A .* (A < 10)

answered Oct 20, 2015 at 8:29

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2 Comments

Thanks a lot. I guess you are genius!

Technically A<10 returns a logical matrix, which is represented as binaries. Good answer none the less