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is there an alternative to pdist2 that calculates the distance between a matrices with different column numbers

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James Peach
James Peach on 4 Sep 2020
Commented: James Peach on 5 Sep 2020
I was wondering if there is a built in matlab fucntion that calculates the distance between two arrays that don't have the same column number like in pdist2? For example if matrix A was 102x3 and Matrix B was 3x15, is there a MATLAB function that can do this calculation for me or do I need to use nested for loops?

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Adam Danz
Adam Danz on 4 Sep 2020
Edited: Adam Danz on 4 Sep 2020
You just need to transpose B
d = pdist2(A, B');
d(i,j) is the distance between A(i,:) and B(:,j).

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John D'Errico
John D'Errico on 5 Sep 2020
Adam did not tell you to transpose the array and save it as such, replacing the original array. He said to transpose it inline, as:
d = pdist2(A, B');
That changes nothing about the original array B for the next time you will use it.
Adam Danz
Adam Danz on 5 Sep 2020
As evidence of what John said, note the indexing I used in my answer to describe d.
d(i,j) is the distance between A(i,:) and B(:,j).

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