hi, i want to find in a binary random matrice position of columns full of zeros (a column of zeros)..

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loukil sana
loukil sana 2016-1-11
编辑： Stephen23 2016-1-11
is there any function in matlab which retur the position of a column ??

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Stephen23
Stephen23 2016-1-11
You can use all and find to locate columns containing only zeros:
>> X = randi(2,3,23)-1
X =
0 0 0 0 1 1 1 0 1 1 0 0 1 1 1 1 1 1 1 1 1 0 0
1 0 0 0 0 0 1 0 1 1 0 0 0 1 1 0 0 1 0 0 1 0 0
0 1 0 1 0 0 1 1 1 1 0 0 0 0 1 1 0 1 0 1 1 1 0
>> find(all(X==0,1))
ans =
3 11 12 23

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