Select every other element of a vector
Remove any row in which a NaN appears
Find the maximum number of decimal places in a set of numbers
Find my daddy long leg (No 's')
Reindex a vector (★★)
Get the elements of diagonal and antidiagonal for any m-by-n matrix (★★★★)
Vector creation using linspace
Average of corner elements of a matrix (★★)
Matrix indexing with two vectors of indices (★★)
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