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Deleting a row or column of a matrix

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Zach
Zach 2011-8-9
I have a Matrix but I only need the first 20 columns of the matrix. I was wondering if there was a way to delete the rest of the matrix instead of having to create a new matrix all together. If it's not possible is there a better way of doing this compare to
for j=1:20
for k=1:20
u(j,k)=y(j,k)
end
end
Thanks in advance!

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2011-8-9
Or y(21:end,21:end)=[]

更多回答（1 个）

Sean de Wolski
Sean de Wolski 2011-8-9
u = y(1:20,1:20);

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