vlt.string.quotelevel

  QUOTELEVEL - Determine the enclosure depth level for text within quotes (0 = outside quotes, 1 = inside quotes)

   LEVEL = vlt.string.quotelevel(STR)

   For the string STR, returns an equally long array of numbers
   LEVEL that indicates whether or not the text is inside quotes.

   One can also call:

   LEVEL = vlt.string.quotelevel(STR, QUOTESYMBOL)

   to specify a different symbol than '"' to be used for the quote.

   Examples:
      str = 'this is "a test" of quote depth';
      level=vlt.string.quotelevel(str)

      str2 = 'this is ''a test'' of quote depth';
      level2=vlt.string.quotelevel(str2,'''')
      % Note that '''' produces a single ' as a string in Matlab