\input fig4tex
\def\GraphLegend{$y = tg(x)$}
% 1. Definition of characteristic points
\figinit{mm}
\def\Xmin{-30.00000}
\def\Ymin{-40.00000}
\def\Xmax{30.00000}
\def\Ymax{39.99999}
\def\Xori{30.00000}
\def\Yori{40.00000}
\figpt0:(\Xori,\Yori)
% 2. Creation of the graphical file
\psbeginfig{}
\def\Xmaxx{\Xmax} % To customize the position
\def\Ymaxx{\Ymax} % of the arrow-heads of the axes.
\psaxes 0(\Xmin, \Xmaxx, \Ymin, \Ymaxx)
\pslineC(
0 0,
1.01694 4.36362,
2.03389 7.98272,
3.05084 11.04219,
4.06779 13.67059,
5.08474 15.96009,
6.10169 17.97856,
7.11864 19.77703,
8.13559 21.39470,
9.15254 22.86215,
10.16949 24.20360,
11.18644 25.43854,
12.20338 26.58281,
13.22033 27.64945,
14.23728 28.64928,
15.25423 29.59143,
16.27118 30.48361,
17.28813 31.33242,
18.30508 32.14358,
19.32203 32.92206,
20.33898 33.67221,
21.35593 34.39793,
22.37288 35.10267,
23.38983 35.78958,
24.40677 36.46151,
25.42372 37.12111,
26.44067 37.77085,
27.45762 38.41304,
28.47457 39.04993,
29.49152 39.68366,
30.50847 40.31633,
31.52542 40.95006,
32.54237 41.58695,
33.55932 42.22914,
34.57627 42.87888,
35.59322 43.53848,
36.61016 44.21041,
37.62711 44.89732,
38.64406 45.60206,
39.66101 46.32778,
40.67796 47.07793,
41.69491 47.85641,
42.71186 48.66757,
43.72881 49.51638,
44.74576 50.40856,
45.76271 51.35071,
46.77966 52.35054,
47.79661 53.41718,
48.81355 54.56145,
49.83050 55.79639,
50.84745 57.13784,
51.86440 58.60529,
52.88135 60.22296,
53.89830 62.02143,
54.91525 64.03990,
55.93220 66.32940,
56.94915 68.95780,
57.96610 72.01727,
58.98305 75.63637,
60 80.00000000000000003078
)
\psendfig
% 3. Writing text on the figure
\figvisu{\figBoxA}{\GraphLegend}{%
\figptsaxes 1:0(\Xmin, \Xmaxx, \Ymin, \Ymaxx)
% Points 1 and 2 are the end points of the arrows
\figwritee 1:(5pt) \figwriten 2:(5pt)
\figptsaxes 1:0(\Xmin, \Xmax, \Ymin, \Ymax)
% Points 1 and 2 are the first two end points of the axes
\figwrites 1:$1.20$(5pt) \figwritew 2:$2.57$(8pt)
% Points 3 and 4 are the two other end points of the axes
\figpttraC 3:=0/\Xmin,0/ \figwrites 3:$-1.20$(5pt)
\figpttraC 4:=0/0,\Ymin/ \figwritew 4:$-2.57$(8pt)
}
\centerline{\box\figBoxA}
\bye