How to pull out rows with a unique value in a specified column?

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Louisa Thomas
Louisa Thomas 2017-10-24
回答： Alan Weiss 2017-10-24
I have a matrix variable called 'summed' which is 1330 x 2.
I want to pull out every row of 'summed' that has a unique value in the second column, and store these in a new variable, called 'uniqueVals'
I tried the following line of code:
uniqueVals = summed(:,2) == unique;
Which didn't work, and I am unsure how I should go about doing this?

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采纳的回答

Alan Weiss
Alan Weiss 2017-10-24
Perhaps the following works:
[C,ia] = unique(summed(:,2));
uniqueVals = summed(ia,:);
Alan Weiss
MATLAB mathematical toolbox documentation

更多回答（1 个）

Louisa Thomas
Louisa Thomas 2017-10-24
the values in summed are integers, and I'm using MATLAB R2015b

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