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−### Copyright (C) 1996 John W. Eaton
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−###
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−### This file is part of Octave.
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−###
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−### Octave is free software; you can redistribute it and/or modify it
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−### under the terms of the GNU General Public License as published by
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−### the Free Software Foundation; either version 2, or (at your option)
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−### any later version.
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−###
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−### Octave is distributed in the hope that it will be useful, but
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−### WITHOUT ANY WARRANTY; without even the implied warranty of
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−### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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−### General Public License for more details.
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−###
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−### You should have received a copy of the GNU General Public License
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−### along with Octave; see the file COPYING.  If not, write to the Free
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−### Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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−### 02111-1307, USA.
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−
+
−## usage: grid ("on" | "off")
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−##
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−## Turn grid lines on or off for plotting.
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−##
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−## If the argument is omitted, "on" is assumed.
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−##
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−## See also: plot, semilogx, semilogy, loglog, polar, mesh, contour,
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−##           bar, stairs, gplot, gsplot, replot, xlabel, ylabel, title 
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−
+
−function grid (x)
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−
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−  if (nargin == 0)
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−    set grid;
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−  elseif (nargin == 1)
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−    if (isstr (x))
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−      if (strcmp ("off", x))
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−        set nogrid;
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−      elseif (strcmp ("on", x))
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−        set grid;
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−      else
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−    usage ("grid (\"on\" | \"off\")");
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−      endif
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−    else
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−      error ("grid: argument must be a string");
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−    endif
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−  else
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−    error ("usage: grid (\"on\" | \"off\")");
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−  endif
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−
+
−endfunction