Mercurial > hg > octave-lyh
changeset 2270:cfcf8ff7d2dd
[project @ 1996-05-24 02:10:11 by jwe]
Initial revision
author | jwe |
---|---|
date | Fri, 24 May 1996 02:10:11 +0000 |
parents | 517a43164a60 |
children | 707b9396ad2c |
files | scripts/strings/substr.m |
diffstat | 1 files changed, 52 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/scripts/strings/substr.m @@ -0,0 +1,52 @@ +# Copyright (C) 1996 John W. Eaton +# +# 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