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 2016-1-11

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编辑： Stephen23 2016-1-11

采纳的回答： Stephen23

is there any function in matlab which retur the position of a column ??

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Answer 1

Stephen23 2016-1-11

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在 MATLAB Online 中打开

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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loukil sana 2016-1-11

hi thanks for your answer.. i have an other question please. why i can't find the boucle do...while(cond) in matlab? is there any other function to replace it?