Mercurial > octave-nkf
view scripts/strings/substr.m @ 2270:cfcf8ff7d2dd
[project @ 1996-05-24 02:10:11 by jwe]
Initial revision
author | jwe |
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date | Fri, 24 May 1996 02:10:11 +0000 |
parents | |
children | 6dedd4e0a82f |
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# 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