Counting all the numbers above a certain threshold in a matrix, keeping each event seperate.
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Charles Brown-King
on 12 Feb 2016
Commented: Charles Brown-King
on 12 Feb 2016
I have a (130,93) matrix and I need to know how many times the numbers in each column goes above a certain value, this value stays the same for each column. Please can someone help me out?
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Star Strider
on 12 Feb 2016
‘... this value stays the same for each column.’
Wouldn’t you just need to count one column then?
Accepted Answer
dpb
on 12 Feb 2016
I'm not positive re: the comment about value being same for each column, either, but the given the prhasing I'm guessing it's referring to the threshold. If so, solution is simply
s=sum(x>threshold);
If the threshold were by column instead, then
s=sum(bsxfun(@gt,x,threshold));
where threshold is a row vector of length size(x,2)
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