How to identify a specific location within a matrix based on a value
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Hi,
I have a matrix of all 0s and 1s. I'd like to identify the exact location of the first nonzero value of each row. I've found several different ways to identify the nonzero value (e.g., find()) but I don't need to know the value (I know it's 1), I need to know it's precise location.
I'm working on a program that will identify the first nonzero value in each row and compare those locations to another matrix and eventually I would like to shift matrix 2 to match the first nonzero values in matrix 1.
Any help with identifying the location of a specific value in a row (in this case the first nonzero value) is greatly appreciated.
Thanks.
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yonatan gerufi
2014-9-8
编辑：yonatan gerufi
2014-9-8
possible solution:
% construct random binary matrix
a=round(rand(5,10));
% find first minimal value:
[value,position] = max(a,[],2)
now 'position' will contain the position of first maximum element in a row.
'value' will contain this element value.
unless all the line is 0's (you should check it at 'value') 'position' will give you the first one!
if you have any more ways please post them.
good luck!
3 个评论
Tricia
2014-9-8
Tricia
2014-9-8
yonatan gerufi
2014-9-8
sorry, i don't i understand your question.
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