matrix column element limiting

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mehrdad asadi
mehrdad asadi 2015-7-8
编辑： Stephen23 2015-7-8
hi,
I have a matrix say 200*30. I need to limit the elements of 29th and 30th columns with different constraints. how can I do that?
thanks,

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Azzi Abdelmalek
Azzi Abdelmalek 2015-7-8
Example
A=rand(200,30)
idx=A(:,29)>0.5 & A(:,30)<0.7
out=A(idx,:)
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mehrdad asadi
mehrdad asadi 2015-7-8
thank you A.Abdelmalek,
I did this, but because I have 4 constraints, and it should be repeated many times in a for loop, it seems it's not that much optimized! thanks anyway, right now, this is the only solution that crosses the mind.
Stephen23
Stephen23 2015-7-8
编辑：Stephen23 2015-7-8
Azzi Abdelmalek's solution is much more optimized than using a loop. This is how MATLAB works best, using basic code vectorization and indexing.

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