Mercurial > octave
view scripts/strings/substr.m @ 2303:5cffc4b8de57
[project @ 1996-06-24 09:15:24 by jwe]
author | jwe |
---|---|
date | Mon, 24 Jun 1996 09:15:24 +0000 |
parents | 6dedd4e0a82f |
children | 2b5788792cad |
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### Copyright (C) 1996 Kurt Hornik ### ### This file is part of Octave. ### ### Octave is free software; you can redistribute it and/or modify it ### under the terms of the GNU General Public License as published by ### the Free Software Foundation; either version 2, or (at your option) ### any later version. ### ### Octave is distributed in the hope that it will be useful, but ### WITHOUT ANY WARRANTY; without even the implied warranty of ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ### General Public License for more details. ### ### You should have received a copy of the GNU General Public License ### along with Octave; see the file COPYING. If not, write to the Free ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA ### 02111-1307, USA. function t = substr (s, beg, len) ## usage: substr (s, beg, len) ## ## Returns the substring of S of length LEN starting at index BEG. ## If LEN is missing, the substring extends to the end of S. ## Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>. if (nargin < 2 || nargin > 3) usage ("substr (s, beg, len)"); endif if (isstr (s)) nc = columns (s); if (beg > 0 && beg <= nc) if (nargin == 2) eos = nc; else eos = beg + len - 1; endif if (eos <= nc) t = s (:, beg:eos); else error ("substr: length = %d out of range", len); endif else error ("substr: beginning index = %d out of range", beg); endif else error ("substr: expecting string argument"); endif endfunction