Given a matrix, return the sum of all the elements across the diagonals.
E.g. A = [1 2 3;
4 5 6;
7 8 9;]
sum = 25 as sum of (1, 3, 7, 9,5)
Basically the same as Problem 1158
only the odds.
Works for current test suite, but not in general.
Try adding an even sized matrix (magic(6), for instance) to the test suite. If the two diagonals don't share any points, a lot of these solutions won't work.
First time I see this notation.
Summing Digits within Text
Replace multiples of 5 with NaN
Try 1.5.4: Celsius to Fahrenheit
Return the names and values of the input arguments of a function
Find offset of given matrix element from first matrix element
Find supported functions
Best Fit RMS
Back to basics - array operations
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