Removing Zeros from the Beginning of a Matrix

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Joe 2012-9-28

评论： PetterE 2020-9-8

Hi I am still fairly new to matlab and not very familiar with it yet. I was wondering how I could remove zeros from the beginning of my matrix.

i.e. A = [0 0 0 1 2 3 0 4 5] and removing the first zeros so that A becomes B where B = [1 2 3 0 4 5]

Thanks in advance for the help.

Andrei Bobrov 2012-9-28

B = A(cumsum(A,2) > 0)

Brandon Bihl 2018-9-3

doesnt work for negative values of A. ie. [ 0 0 -1 0 1 2 3]

PetterE 2020-9-8

Use cumsum(abs(A),2) instead.

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