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__plt2vv__.m

## Copyright (C) 1996, 1997 John W. Eaton
##
## This program 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.
##
## This software 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 this software; see the file COPYING.  If not, see
## <http://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @deftypefn {Function File} {} __plt2vv__ (@var{x}, @var{y}, @var{fmt})
## @end deftypefn

## Author: jwe
## Modified to work with Grace by Teemu Ikonen <tpikonen@pcu.helsinki.fi> 
## Created: 30.7.2003

function __plt2vv__ (x, y, fmt)

  if (nargin < 2 || nargin > 3)
    msg = sprintf ("__plt2vv__ (x, y)\n");
    msg = sprintf ("%s              __plt2vv__ (x, y, fmt)", msg);
    usage (msg);
  elseif (nargin == 2)
    fmt = "";
  elseif (rows (fmt) > 1)
    fmt = fmt (1, :);
  endif

  [x_nr, x_nc] = size (x);
  [y_nr, y_nc] = size (y);

  if (x_nr == 1)
    x = x';
    tmp = x_nr;
    x_nr = x_nc;
    x_nc = tmp;
  endif

  if (y_nr == 1)
    y = y';
    tmp = y_nr;
    y_nr = y_nc;
    y_nc = tmp;
  endif

  if (x_nr != y_nr)
    error ("__plt2vv__: vector lengths must match");
  endif

  tmp = [x, y];

  __grpltfmt__(tmp, fmt, "xy");

endfunction

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