How to check if all the numbers in a column of a matrix are equal and return that value

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William
William 2013-11-2
评论： William 2013-11-2
I am trying to construct a way to find a column of equal numbers in matrix of any size. There will only be one column where the numbers are equal. I then need to extract that number (the number that is the same throughout the column) to a variable that can be called on. I have tried for loops, but I cannot get it to work. Any help would be greatly appreciated.

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Azzi Abdelmalek
Azzi Abdelmalek 2013-11-2
编辑：Azzi Abdelmalek 2013-11-2
If A is your matrix
idx=find(all(~diff(A)))
out=A(1,idx)

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