forked from johannesgerer/jburkardt-f
-
Notifications
You must be signed in to change notification settings - Fork 2
/
bar_plot.html
201 lines (173 loc) · 5.34 KB
/
bar_plot.html
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
189
190
191
192
193
194
195
196
197
198
199
200
201
<html>
<head>
<title>
BAR_PLOT - Bar Plot Data => RGB Arrays.
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
BAR_PLOT <br> Bar Plot Data => RGB Arrays.
</h1>
<hr>
<p>
<b>BAR_PLOT</b>
is a FORTRAN90 library which
makes simple bar plots from data.
</p>
<p>
At the moment, the library contains only one "interesting" routine,
<b>BAR_DATA_TO_RGB</b>, which assumes that the user wants to make
a sort of bar plot. At a number of equally spaced <b>X</b> values,
a set of <b>Y</b> values have been supplied, which are all nonnegative.
Moreover, the <b>Y</b> values have been scaled so that the maximum
sum (or height of the bar) over any <b>X</b> is 1 (or less).
</p>
<p>
<b>BAR_DATA_TO_RGB</b> sets up RGB color arrays that indicate
the appearance of the corresponding bar plot (with gray used for
parts of the plot over which bars do not extend). The arrays
can easily be plotted by calling, for example, the routine
<b>PPMA_WRITE</b> from the PPMA_IO
graphics library.
</p>
<p>
In turn, a PPMA file can be turned into a number of other
useful formats. For example, the
<a href = "http://www.ijg.org/">CJPEG</a> routine can convert
such a file to
<a href = "../../data/jpg/jpg.html">JPEG files</a>, and these
can be displayed on web pages or turned into an animation using
<a href = "http://www.apple.com/quicktime/">QuickTime Pro</a>.
(This is exactly the direction in which I intend to go with
this software.)
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/box_plot/box_plot.html">
BOX_PLOT</a>,
a MATLAB program which
can color in specified entries of
a checkerboard, corresponding to pairs of integer data.
</p>
<p>
<a href = "../../m_src/histogram_display/histogram_display.html">
HISTOGRAM_DISPLAY</a>,
a MATLAB program which
can read data and display a histogram of it.
</p>
<p>
<a href = "../../f_src/ppma_io/ppma_io.html">
PPMA_IO</a>,
a FORTRAN90 library which
reads or writes ASCII Portable Pixel Map (PPM) files.
</p>
<p>
<a href = "../../f_src/table_histogram/table_histogram.html">
TABLE_HISTOGRAM</a>,
a FORTRAN90 program which
reads a file of data and produces a histogram.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "bar_plot.f90">bar_plot.f90</a>, the source code.
</li>
<li>
<a href = "bar_plot.sh">bar_plot.sh</a>,
commands to compile the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "bar_plot_prb.f90">bar_plot_prb.f90</a>,
a sample calling program.
</li>
<li>
<a href = "bar_plot_prb.sh">bar_plot_prb.sh</a>,
commands to compile and run the sample program.
</li>
<li>
<a href = "bar_plot_prb_output.txt">bar_plot_prb_output.txt</a>,
the output file.
</li>
<li>
<a href = "../../data/ppma/sines.ppma">sines.ppma</a>, a
<a href = "../../data/ppma/ppma.html">ASCII PPM file</a>
created by the sample calling program, which used the
<a href = "../../f_src/ppma_io/ppma_io.html">PPMA_IO</a>
graphics library.
</li>
<li>
<a href = "../../data/png/sines.png">sines.png</a>,
a PNG image of the data.
</li>
<li>
<a href = "../../data/jpg/sines.jpg">sines.jpg</a>,
a JPEG image of the data.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>ANGLE_TO_RGB</b> returns a color on the perimeter of the color hexagon.
</li>
<li>
<b>BAR_DATA_EXAMPLE</b> returns some sample bar data.
</li>
<li>
<b>BAR_DATA_TO_RGB</b> makes RGB arrays from bar graph data.
</li>
<li>
<b>GET_UNIT</b> returns a free FORTRAN unit number.
</li>
<li>
<b>I4_LOG_2</b> returns the integer part of the logarithm base 2 of |I|.
</li>
<li>
<b>I4_TO_ANGLE</b> maps integers to points on a circle.
</li>
<li>
<b>PPM_CHECK_DATA</b> checks pixel data.
</li>
<li>
<b>PPMA_WRITE</b> writes an ASCII portable pixel map file.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a time stamp.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../f_src.html">
the FORTRAN90 source codes</a>.
</p>
<hr>
<i>
Last revised on 07 December 2005.
</i>
<!-- John Burkardt -->
</body>
<!-- Initial HTML skeleton created by HTMLINDEX. -->
</html>