bracelevel

  BRACELEVEL - Determine the enclosure depth level for text within braces

   LEVEL = BRACELEVEL(STR)

   For the string STR, returns an equally long array of numbers
   LEVEL that indicates the enclosure depth. The enclosure depth
   answers how many levels deep each character is within parentheses.

   One can also call:

   LEVEL = BRACELEVEL(STR, BRACELEFT, BRACERIGHT)

   And specify the LEFTBRACE and RIGHTBRACE characters.

   Examples:
      str = 'this is (a test of (depth))';
      level=bracelevel(str)

      str2 = 'this is [a test of [depth]]';
      level=bracelevel(str,'[',']')