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plot_int.m
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1996-09-28
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103 lines
# Copyright (C) 1993, 1994, 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA.
function plot_int (caller, ...)
if (nargin == 2)
plot_int_1 (va_arg (), "");
elseif (nargin > 2)
first_plot = 1;
hold_state = ishold;
unwind_protect
x = va_arg ();
nargin = nargin - 2;
x_set = 1;
y_set = 0;
# Gather arguments, decode format, and plot lines.
while (nargin-- > 0)
fmt = "";
new = va_arg ();
if (isstr (new))
if (! x_set)
error ("plot: no data to plot");
endif
fmt = plot_opt (caller, new);
if (! y_set)
plot_int_1 (x, fmt)
else
plot_int_2 (x, y, fmt)
endif
hold on
x_set = 0;
y_set = 0;
elseif (x_set)
if (y_set)
plot_int_2 (x, y, fmt);
hold on
x = new;
y_set = 0;
else
y = new;
y_set = 1;
endif
else
x = new;
x_set = 1;
endif
endwhile
# Handle last plot.
if (x_set)
if (y_set)
plot_int_2 (x, y, fmt);
else
plot_int_1 (x, fmt);
endif
endif
unwind_protect_cleanup
if (! hold_state)
hold off
endif
end_unwind_protect
else
msg = sprintf ("%s (x)\n", caller);
msg = sprintf ("%s %s (x, y)\n", msg, caller);
msg = sprintf ("%s %s (x2, y1, x2, y2)\n", msg, caller);
msg = sprintf ("%s %s (x, y, fmt)", msg, caller);
usage (msg);
endif
endfunction