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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA
// Copyright (C) 2011 - DIGITEO - Michael Baudin
// Copyright (C) 2012 - DIGITEO - Allan CORNET
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function contour(x, y, z, nz, theta, alpha, leg, flag, ebox, zlev)
function contour_demo()
function z = Surf1(x, y)
z = x.^2 + y.^3;
endfunction
function z = Surf2(x, y)
z = x.^2 + y.^2;
endfunction
x = -1:0.1:1;
y = x;
z = eval3d(Surf2, x, y)
//scf();
subplot(211);
contour(x, y, Surf1, 10);
subplot(212);
plot3d(x, y, z);
contour(x, y, z + 0.1, 10, flag = [0 2 4]);
endfunction
rhs = argn(2);
// demo
if rhs == 0 then
contour_demo();
return
end
if rhs < 4 then
error(msprintf(gettext("%s: Wrong number of input argument(s): At least %d expected.\n"), "contour", 4));
end
if type(x) <> 1 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real vector expected.\n"), "contour", 1));
end
if type(y) <> 1 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real vector expected.\n"), "contour", 2));
end
if type(z) <> 1 & type(z) <> 13 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real matrix or Scilab function expected.\n"), "contour", 3));
end
if type(nz) <> 1 then
error(999, msprintf(gettext("%s: Wrong type for input argument #%d: Real matrix expected.\n"), "contour", 4));
end
if ~isvector(x) then
error(999, msprintf(gettext("%s: Wrong size for input argument #%d: Real vector expected.\n"), "contour", 1));
end
if ~isvector(y) then
error(999, msprintf(gettext("%s: Wrong size for input argument #%d: Real vector expected.\n"), "contour", 2));
end
levels = [];
opts = [];
if exists("theta", "local") == 1 then
opts = [opts, "theta=theta"];
end
if exists("alpha", "local") == 1 then
opts = [opts, "alpha=alpha"];
end
if exists("leg" , "local") == 1 then
opts = [opts, "leg=leg"];
end
if exists("ebox" , "local") == 1 then
opts = [opts, "ebox=ebox"];
end
if exists("flag" , "local") == 0 then
flag = [2 2 3];
end
if exists("zlev" , "local") == 0 then
zlev = 0;
end
if or(type(z) == [11 13]) then
fun = z;
clear z //to avoid redfinition warning
if type(fun) == 11 then
comp(fun);
end
z = feval(x, y, fun);
end
job = flag(1);
if rhs == 4 | job == 2 then
contour2d(x, y, z, nz);
return;
end
if size(nz, "*") == 1 then
style = 1:nz;
else
style = 1:size(nz, "*");
end
opts = strcat([opts, "flag=flag(2:3)"], ",");
[xc, yc] = contour2di(x, y, z, nz);
fig = gcf();
a = gca();
fg = a.foreground;
v = fig.immediate_drawing;
fig.immediate_drawing = "off";
cnt = 0;
fpf = xget("fpf");
if fpf == "" then
fpf = "%.2g";
end
k = 1;
n = yc(k);
c = 0;
level = %inf;
while k < length(xc)
n = yc(k)
if xc(k) ~= level then
c = c+1;
level = xc(k);
levels = [level levels];
a.foreground = c;
if cnt > 0 then
glue(a.children(1:cnt));
cnt = 0;
end
end
if job == 1 then
zz = zlev;
else
zz = level;
end
execstr("param3d(xc(k + (1:n)), yc(k + (1:n)), zz * ones(1, n), " + opts + ")");
cnt = cnt + 1;
if stripblanks(fpf) <> "" then
// don't clip as in contour2d since we are in 3D here
// and stringbox gives data in 2D
xstring(xc(k + 1 + n / 2), yc(k + 1 + n/2), " " + msprintf(fpf, level));
e = gce();
e.data(3) = zz;
e.clip_state = "off";
cnt = cnt + 1;
end
k = k + n + 1;
end
if cnt > 0 then
glue(a.children(1:cnt));
cnt = 0;
end
set("current_entity", a);
a.foreground = fg;
if flag(3) == 0 then
a.axes_visible = "off";
a.box = "off";
elseif flag(3) == 1 then
a.axes_visible = "off";
a.box = "off";
elseif flag(3) == 2 then
a.axes_visible = "off";
a.box = "back_half";
elseif flag(3) == 3 then
a.axes_visible = "off";
a.box = "on";
elseif flag(3) >= 4 then
a.axes_visible = "on";
a.box = "on";
end
fig.immediate_drawing = v;
endfunction
|
