classify a matrix according to a "flag" value

Hello

I have a rather large matrix with 3 columns and several thousand rows (!) (1000000x3)

As example

     c1  c2  c3
r1   10  -5   0 
r2   20 -10   1
..   ... ...  0
rn   100 -1   0

I would like to set as my criterion the third column, if the number is 0 then collect all the information from the other two column and create a new matrix.

    c1  c2  c3
r1   10  -5   0 
r2   ... ...  0
rn   100 -1   0

any suggestions? thank you very much

Answer 1

[Azzi Abdelmalek]

out=A(A(:,3)==0,:)

[George]

thanks very much for the answer

I played around a bit and did this, perhaps it may be ok as well ?

d(:,3)==0

A=find(d(:,3)==0);

d1=d(A,1:2);