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... ;-)
Permute diagonal and antidiagonal
Sum the elements in either diagonal of a square matrix
Return area of square
Order of things - 1
Create a random logical vector of N elements of which M are true.
Make a KITT-scanner on the command line
Mmm! Multi-dimensional Matrix Multiplication
Order of things - 2
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