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scripts/plot/ribbon.m

changeset 10289: 4b124317dc38
parent:dbd0c77e575e
author: John W. Eaton <jwe@octave.org>
date: Tue Feb 09 20:58:55 2010 -0500 (58 minutes ago)
permissions: -rw-r--r--
description: base_properties::set_children: account for hidden children 
     1## Copyright (C) 2007, 2008, 2009 Kai Habel

     2##

     3## This file is part of Octave.

     4##

     5## Octave is free software; you can redistribute it and/or modify it

     6## under the terms of the GNU General Public License as published by

     7## the Free Software Foundation; either version 3 of the License, or (at

     8## your option) any later version.

     9##

    10## Octave is distributed in the hope that it will be useful, but

    11## WITHOUT ANY WARRANTY; without even the implied warranty of

    12## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13## General Public License for more details.

    14##

    15## You should have received a copy of the GNU General Public License

    16## along with Octave; see the file COPYING.  If not, see

    17## <http://www.gnu.org/licenses/>.

    18

    19## -*- texinfo -*-

    20## @deftypefn  {Function File} {} ribbon (@var{x}, @var{y}, @var{width})

    21## @deftypefnx {Function File} {} ribbon (@var{y})

    22## @deftypefnx {Function File} {@var{h} =} ribbon (@dots{})

    23## Plot a ribbon plot for the columns of @var{y} vs.  @var{x}.  The

    24## optional parameter @var{width} specifies the width of a single ribbon

    25## (default is 0.75).  If @var{x} is omitted, a vector containing the

    26## row numbers is assumed (1:rows(Y)).  If requested, return a vector

    27## @var{h} of the handles to the surface objects.

    28## @seealso{gca, colorbar}

    29## @end deftypefn

    30

    31## Author: Kai Habel <kai.habel at gmx.de>

    32

    33function h = ribbon (x, y, width)

    34

    35  newplot ();

    36

    37  if (nargin == 1)

    38    y = x;

    39    if (isvector (y))

    40      y = y(:);

    41    endif

    42    [nr, nc] = size (y);

    43    x = repmat ((1:nr)', 1, nc);

    44    width = 0.75;

    45  elseif (nargin == 2)

    46    width = 0.75;

    47  elseif (nargin != 3)

    48    print_usage ();

    49  endif

    50

    51  if (isvector (x) && isvector (y))

    52    if (length (x) != length (y))

    53      error ("ribbon: in case of vectors, X and Y must have same length");

    54    else

    55      [x, y] = meshgrid (x, y);

    56    endif

    57  else

    58    if (! size_equal(x, y))

    59      error ("ribbon: in case of matrices, X and Y must have same size");

    60    endif

    61  endif

    62

    63  [nr, nc] = size (y);

    64  tmp = zeros (1, nc);

    65

    66  for c = nc:-1:1

    67    zz = [y(:,c), y(:,c)];

    68    yy = x(:,c);

    69    xx = [c - width / 2, c + width / 2];

    70    [xx, yy] = meshgrid (xx, yy);

    71    cc = ones (size (zz)) * c;

    72    tmp(c) = surface (xx, yy, zz, cc);

    73  endfor

    74

    75  ax = get (tmp(c), "parent");

    76

    77  if (! ishold ())

    78    set (ax, "view", [-37.5, 30], "box", "off", "xgrid", "on",

    79	 "ygrid", "on", "zgrid", "on");

    80  endif

    81

    82  if (nargout > 0)

    83    h = tmp;

    84  endif

    85

    86endfunction

    87

    88%!demo

    89%! [x, y, z] = sombrero ();

    90%! [x, y] = meshgrid (x, y);

    91%! ribbon (y, z);