How can I process all the possible pairs of arrays without using 2 nested for loops?

I have a number of arrays and I want to compute a distance (using a home made function) between all possible pairs.

Right now I have 2 for loops like this

for i=1:(N-1)
    for j=(i+1):N
        applymyfunction (array(i), array(j))
    end
end

I was wondering if there was a way to do this without using nested loops.

Thanks - F.

[Stephen23]

I don't see any particular disadvantage in using loops:

• loops are efficient,
• the intent is clear,
• debugging is easy,
• your function will get called exactly how many times it needs to be called.

What is your specific reason for avoiding loops?

Answer 1

[Walter Roberson]

if all(triu(FirstMatrix) == triu(SecondMatrix), 'all')

[FredMat]

Maybe "compare" was not the right word here.

I rewrote my question. Hopefully, it's more clear.

[Walter Roberson]

pdist2() or pdist(), specifying a function handle as the distance function.