1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
## Copyright (C) 1996 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.
## Author: jwe
## Modified: jc
function __plt__ (caller, varargin)
global __pl
strm = __pl_init;
switch(caller)
case ("plot")
__pl.type(strm) = 0;
case ("logx")
__pl.type(strm) = 10;
case ("logy")
__pl.type(strm) = 20;
case ("lgxy")
__pl.type(strm) = 30;
otherwise
__pl.type(strm) = 0;
error("__plt__: FIXME")
endswitch
if (!ishold)
__pl.items(strm) = 1;
__pl.lxm(strm) = __pl.lym(strm) = realmax;
__pl.lxM(strm) = __pl.lyM(strm) = -realmax;
endif
if (nargin == 2)
__plt1__ (varargin{1}, "");
elseif (nargin > 2)
hold_state = ishold;
unwind_protect
k = 1;
x = varargin{k++};
nargin = nargin - 2;
x_set = 1;
y_set = 0;
## Gather arguments, decode format, and plot lines.
while (nargin-- > 0)
fmt = "";
new = varargin{k++};
if (ischar (new))
if (! x_set)
error ("plot: no data to plot");
endif
fmt = new;
if (! y_set)
__plt1__ (x, fmt);
else
__plt2__ (x, y, fmt);
endif
hold on;
x_set = 0;
y_set = 0;
elseif (x_set)
if (y_set)
__plt2__ (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)
__plt2__ (x, y, fmt);
else
__plt1__ (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
__pl_plotit;
endfunction
|
