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

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?

[per isakson]

• Are summed floating point numbers?
• Which release of Matlab do you use?

Answer 1

[Alan Weiss]

Perhaps the following works:

[C,ia] = unique(summed(:,2));
uniqueVals = summed(ia,:);

Alan Weiss

MATLAB mathematical toolbox documentation

Answer 2

[Louisa Thomas]

the values in summed are integers, and I'm using MATLAB R2015b