This should be quite straightforward but at 2a.m. my brains are not working 100%. ;)
I has exactly the same idea!!
but on the second line I used directly the logical indexing... ;-)
Determine if a Given Number is a Triangle Number
Insert zeros into vector
Is this triangle right-angled?
Wrap a vector, but insert NaN's at the wrap-positions.
Add a row of zeros on top of a matrix
Power supply: 230V to 115V
Order of things - 2
Bleed non-zeros to the right using REGEXP, and that sort of cheatcodess...
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