Name

---

      STR_DROP_PUNC

Purpose

---

      Return a string with punctuation removed.

Category

---

Calling Sequence

---

      out = str_drop_punc(in).

Inputs

---

      txt = input string. in

Keyword Parameters

---

Keywords

---

        /LOWER convert to all lowercase.
        /UPPER convert to all uppercase.
        /COMPRESS remove all white space.

Outputs

---

      out = returned string. out

Common Blocks

---

Notes

---

      Notes: Useful for comparing strings with minor differences.

Modification History

---

      R. Sterner, 2002 Apr 18
      R. Sterner, 2004 Aug 05 --- Dropped all but alphanumeric characters.
      R. Sterner, 2010 May 23 --- Converted arrays from () to [].
  Copyright (C) 2002, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.