Richard, I think your test suite has an error in it. Both pd and pad will result in the same matrix, as they're both circshifted by [1 1-i] Will pad=fliplr(pad); after the for loop correct this problem?
Test Suite fixed. Who new that 1-i is the same as -i+1.
I had not recognized the symmetry of row and column processing. A very succinct method to create a Knight pattern.
Solve the set of simultaneous linear equations
Formatting currency numbers
How long is the longest prime diagonal?
Find a subset that divides the vector into equal halves
Find: Faster Alternatives for Large Sorted/Unique Vectors
Knot Count - Speed
GJam 2012 Qualifier: Tongues
Unique: Enhanced Performance - Large and Wide Array - Speed Improvement (66% savings)
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