Find Numbers in a String

find_nums finds all of the numbers in a string and returns an numeric array, nums, with all of the numbers that were found. By specifying flag as 1,2,3 or 4, the program will find: complex numbers, real numbers, integers, or currency (dollars) respectively.

Also a cell array of the matched string is returned. The cell array maybe useful for reprinting numbers in a new table, using a different parsing method to extract the numbers, or reformatting such as removing spaces.