How to find vector in array of vectors with the highest value of one component?

I feel like there's an easy solution to this that I'm missing. I have an array of points, p(x,y,z,i), in which the first three components, x, y, and z, are a point in 3d space and the last component, i, is the number assigned to that point. I want to search through the array and find the vector with the highest y-value. How can I do this?

Answer 1

[Matt J]

If I assume that p is an Nx4 array, then,

[~,row]=max(p(:,2));

 result=p(row,1:3)

[Michael Boyte]

This worked with a minor modification that may be unique to the way I defined my points. Instead of max(p(:,2)), I did max(p(2,:)).

To add to this question, I notice max() will return the first instance of the highest value. Is there an easy way to get it to return the last instance of the highest value?

[Torsten]

Apply fliplr or flipud to the vector and use max after this operation.

Or use the solution described here:

https://de.mathworks.com/matlabcentral/answers/107735-find-the-last-position-of-maximum-value-in-a-matrix

[Michael Boyte]

That did it. Thanks!