How to change matrix?

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Ayob
Ayob 2013-6-1
I have a 6*3 matrix and I want to change to 6*2 matrix, how can I do it?
example:
N1=[1 2 3;4 5 6]
then
N1=[1 2;4 5]

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Azzi Abdelmalek
Azzi Abdelmalek 2013-6-1
编辑：Azzi Abdelmalek 2013-6-1
N1=[1 2 3;4 5 6]
N1=N1(:,1:2) % : means all lines, and 1:2 means column 1 to 2
Look at Matrix indexing in Matlab

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