Well, this source is the degenerate case where the objects holding the records are turned into simple arrayrefs, to illustrate the algorithm. I'm willing and able to refactor, though, of course.

The transposition happens because the reductions need to be applied to columns, and the functions sum(), avg(), etc. operate on lists. The only alternative to the full transposition I can see would be a column splice -> list/array, which essentially results in the same thing.

i.e. I don't see a way to avoid the transposition, one way or another ... ? Maybe it's me that's missing something?

In reply to Re^4: An efficient, scalable matrix transformation algorithm by Luftkissenboot
in thread An efficient, scalable matrix transformation algorithm by Luftkissenboot

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