Removing Zeros from the Beginning of a Matrix

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.

Answer 1

[Andrei Bobrov]

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

[Brandon Bihl]

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

[PetterE]

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