NUM2CELLSTR convert array of floating-point numbers to cell array of strings
NUM2CELLSTR(X) converts array X to cell array of strings.
If X is a two- or multi-dimensional array, it will be
flattened (all elements will still be included).
NUM2CELLSTR(X, P) is the same but uses precision P, where P is an integer.
NUM2CELLSTR(X, P, S) same as above but includes a prefix string to
each cell.
This clumsy routine would be unnecessary if Matlab provided something
like python's string.strip() function.
See also SPRINTF, CELLSTR