--- /dev/null
+## Copyright (C) 1996-2012 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 3 of the License, 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, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} plot3 (@var{args})
+## Produce three-dimensional plots. Many different combinations of
+## arguments are possible. The simplest form is
+##
+## @example
+## plot3 (@var{x}, @var{y}, @var{z})
+## @end example
+##
+## @noindent
+## in which the arguments are taken to be the vertices of the points to
+## be plotted in three dimensions. If all arguments are vectors of the
+## same length, then a single continuous line is drawn. If all arguments
+## are matrices, then each column of the matrices is treated as a
+## separate line. No attempt is made to transpose the arguments to make
+## the number of rows match.
+##
+## If only two arguments are given, as
+##
+## @example
+## plot3 (@var{x}, @var{c})
+## @end example
+##
+## @noindent
+## the real and imaginary parts of the second argument are used
+## as the @var{y} and @var{z} coordinates, respectively.
+##
+## If only one argument is given, as
+##
+## @example
+## plot3 (@var{c})
+## @end example
+##
+## @noindent
+## the real and imaginary parts of the argument are used as the @var{y}
+## and @var{z} values, and they are plotted versus their index.
+##
+## Arguments may also be given in groups of three as
+##
+## @example
+## plot3 (@var{x1}, @var{y1}, @var{z1}, @var{x2}, @var{y2}, @var{z2}, @dots{})
+## @end example
+##
+## @noindent
+## in which each set of three arguments is treated as a separate line or
+## set of lines in three dimensions.
+##
+## To plot multiple one- or two-argument groups, separate each group
+## with an empty format string, as
+##
+## @example
+## plot3 (@var{x1}, @var{c1}, "", @var{c2}, "", @dots{})
+## @end example
+##
+## An example of the use of @code{plot3} is
+##
+## @example
+## @group
+## z = [0:0.05:5];
+## plot3 (cos (2*pi*z), sin (2*pi*z), z, ";helix;");
+## plot3 (z, exp (2i*pi*z), ";complex sinusoid;");
+## @end group
+## @end example
+## @seealso{plot, xlabel, ylabel, zlabel, title, print}
+## @end deftypefn
+
+## Author: Paul Kienzle
+## (modified from __plt__.m)
+
+function retval = plot3 (varargin)
+
+ newplot ();
+
+ x_set = 0;
+ y_set = 0;
+ z_set = 0;
+ property_set = 0;
+ fmt_set = 0;
+ properties = {};
+ tlgnd = {};
+ hlgnd = [];
+ idx = 0;
+
+ ## Gather arguments, decode format, and plot lines.
+ arg = 0;
+ while (arg++ < nargin)
+ new = varargin{arg};
+ new_cell = varargin(arg);
+
+ if (property_set)
+ properties = [properties, new_cell];
+ property_set = 0;
+ continue;
+ endif
+
+ if (ischar (new))
+ if (! z_set)
+ if (! y_set)
+ if (! x_set)
+ error ("plot3: needs x, [ y, [ z ] ]");
+ else
+ z = imag (x);
+ y = real (x);
+ y_set = 1;
+ z_set = 1;
+ if (rows(x) > 1)
+ x = repmat ((1:rows(x))', 1, columns(x));
+ else
+ x = 1:columns(x);
+ endif
+ endif
+ else
+ z = imag (y);
+ y = real (y);
+ z_set = 1;
+ endif
+ endif
+
+ if (! fmt_set)
+ [options, valid] = __pltopt__ ("plot3", new, false);
+ if (! valid)
+ properties = [properties, new_cell];
+ property_set = 1;
+ continue;
+ else
+ fmt_set = 1;
+ while (arg < nargin && ischar (varargin{arg+1}))
+ if (nargin - arg < 2)
+ error ("plot3: properties must appear followed by a value");
+ endif
+ properties = [properties, varargin(arg+1:arg+2)];
+ arg += 2;
+ endwhile
+ endif
+ else
+ properties = [properties, new_cell];
+ property_set = 1;
+ continue;
+ endif
+
+ if (isvector (x) && isvector (y))
+ if (isvector (z))
+ x = x(:);
+ y = y(:);
+ z = z(:);
+ elseif (length (x) == rows (z) && length (y) == columns (z))
+ [x, y] = meshgrid (x, y);
+ else
+ error ("plot3: [length(x), length(y)] must match size(z)");
+ endif
+ endif
+
+ if (! size_equal (x, y, z))
+ error ("plot3: x, y, and z must have the same shape");
+ elseif (ndims (x) > 2)
+ error ("plot3: x, y, and z must not have more than two dimensions");
+ endif
+
+ for i = 1 : columns (x)
+ linestyle = options.linestyle;
+ marker = options.marker;
+ if (isempty (marker) && isempty (linestyle))
+ [linestyle, marker] = __next_line_style__ ();
+ endif
+ color = options.color;
+ if (isempty (color))
+ color = __next_line_color__ ();
+ endif
+
+ tmp(++idx) = line (x(:, i), y(:, i), z(:, i),
+ "color", color, "linestyle", linestyle,
+ "marker", marker, properties{:});
+ key = options.key;
+ if (! isempty (key))
+ hlgnd = [hlgnd, tmp(idx)];
+ tlgnd = {tlgnd{:}, key};
+ endif
+ endfor
+
+ x_set = 0;
+ y_set = 0;
+ z_set = 0;
+ fmt_set = 0;
+ properties = {};
+ elseif (! x_set)
+ x = new;
+ x_set = 1;
+ elseif (! y_set)
+ y = new;
+ y_set = 1;
+ elseif (! z_set)
+ z = new;
+ z_set = 1;
+ else
+ if (isvector (x) && isvector (y))
+ if (isvector (z))
+ x = x(:);
+ y = y(:);
+ z = z(:);
+ elseif (length (x) == rows (z) && length (y) == columns (z))
+ [x, y] = meshgrid (x, y);
+ else
+ error ("plot3: [length(x), length(y)] must match size(z)");
+ endif
+ endif
+
+ if (! size_equal (x, y, z))
+ error ("plot3: x, y, and z must have the same shape");
+ elseif (ndims (x) > 2)
+ error ("plot3: x, y, and z must not have more than two dimensions");
+ endif
+
+ options = __default_plot_options__ ();
+ for i = 1 : columns (x)
+ linestyle = options.linestyle;
+ marker = options.marker;
+ if (isempty (marker) && isempty (linestyle))
+ [linestyle, marker] = __next_line_style__ ();
+ endif
+ color = options.color;
+ if (isempty (color))
+ color = __next_line_color__ ();
+ endif
+
+ tmp(++idx) = line (x(:, i), y(:, i), z(:, i),
+ "color", color, "linestyle", linestyle,
+ "marker", marker, properties{:});
+ key = options.key;
+ if (! isempty (key))
+ hlgnd = [hlgnd, tmp(idx)];
+ tlgnd = {tlgnd{:}, key};
+ endif
+ endfor
+
+ x = new;
+ y_set = 0;
+ z_set = 0;
+ fmt_set = 0;
+ properties = {};
+ endif
+
+ endwhile
+
+ if (property_set)
+ error ("plot3: properties must appear followed by a value");
+ endif
+
+ ## Handle last plot.
+
+ if (x_set)
+ if (y_set)
+ if (! z_set)
+ z = imag (y);
+ y = real (y);
+ z_set = 1;
+ endif
+ else
+ z = imag (x);
+ y = real (x);
+ y_set = 1;
+ z_set = 1;
+ if (rows (x) > 1)
+ x = repmat ((1:rows (x))', 1, columns(x));
+ else
+ x = 1:columns(x);
+ endif
+ endif
+
+ if (isvector (x) && isvector (y))
+ if (isvector (z))
+ x = x(:);
+ y = y(:);
+ z = z(:);
+ elseif (length (x) == rows (z) && length (y) == columns (z))
+ [x, y] = meshgrid (x, y);
+ else
+ error ("plot3: [length(x), length(y)] must match size(z)");
+ endif
+ endif
+
+ if (! size_equal (x, y, z))
+ error ("plot3: x, y, and z must have the same shape");
+ elseif (ndims (x) > 2)
+ error ("plot3: x, y, and z must not have more than two dimensions");
+ endif
+
+ options = __default_plot_options__ ();
+
+ for i = 1 : columns (x)
+ linestyle = options.linestyle;
+ marker = options.marker;
+ if (isempty (marker) && isempty (linestyle))
+ [linestyle, marker] = __next_line_style__ ();
+ endif
+ color = options.color;
+ if (isempty (color))
+ color = __next_line_color__ ();
+ endif
+
+ tmp(++idx) = line (x(:, i), y(:, i), z(:, i),
+ "color", color, "linestyle", linestyle,
+ "marker", marker, properties{:});
+ key = options.key;
+ if (! isempty (key))
+ hlgnd = [hlgnd, tmp(idx)];
+ tlgnd = {tlgnd{:}, key};
+ endif
+ endfor
+ endif
+
+ if (!isempty (hlgnd))
+ legend (gca(), hlgnd, tlgnd);
+ endif
+
+ set (gca (), "view", [-37.5, 30]);
+
+ if (nargout > 0 && idx > 0)
+ retval = tmp;
+ endif
+
+endfunction
+
+%!demo
+%! clf
+%! z = [0:0.05:5];
+%! plot3 (cos(2*pi*z), sin(2*pi*z), z, ";helix;");
+%! plot3 (z, exp(2i*pi*z), ";complex sinusoid;");
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff