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
|
<HTML>
<HEAD>
<TITLE>DENSITY command</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<P><font size="+3" color="green"><B>DENSITY command</B></font></P>
<TABLE border="1" cols="2" frame="box" rules="all" width="572">
<TR>
<TD width="15%" valign="top"><B>Syntax</B>:</TD>
<TD width="85%" valign="top"><CODE>
DENSITY { x y } z</CODE>
</TD></TR>
<TR>
<TD valign="top"><B>Qualifiers</B>:</TD>
<TD valign="top"><CODE>
\GRADIENTS, \DITHERING, \DIFFUSION, \BOXES, \PARTIAL, \XPROFILE, \YPROFILE,
\BORDER, \AXES, \RESET</CODE>
</TD></TR>
<TR>
<TD valign="top"><B>Defaults</B>:</TD>
<TD valign="top"><CODE>
\GRADIENTS, \-PARTIAL, \-XPROFILE, \-YPROFILE, \BORDER, \AXES, \RESET</CODE>
</TD></TR>
</TABLE>
<P>
This command produces a density plot for either data contained in a
matrix or a scattered set of points contained in three vectors.</p>
<P>
<font size="+1" color="green">Density plot types</font></P>
<P>
There are four types of density plot available. The default, requiring no
special qualifier, uses color gradients. Other types are
chosen by using the appropriate qualifier.</p>
<p>
<table>
<tr>
<td><i>density plot types</i></td>
<td><i>qualifier</i></td>
</tr><tr>
<td>color gradients</td><td><CODE>\GRADIENTS</CODE> (default)</td>
</tr><tr>
<td>dithering with points (grey scales)</td><td><CODE>\DITHERING</CODE></td>
</tr><tr>
<td>diffusion with points (grey scales)</td><td><CODE>\DIFFUSION</CODE></td>
</tr><tr>
<td>scaled rectangles</td><td><CODE>\BOXES</CODE></td></tr>
</table>
<P>
<font size="+1" color="green">Draw axes</font></P>
<P>
By default, axes are drawn for the density plot. If the density plot is to be
overlayed on an existing set of axes, use the <CODE>\-AXES</CODE> qualifier and no axes
will be drawn. The axis scales will be left at their current values.</p>
<p>
<font size="+1" color="green">Draw rectangular boundary</font></P>
<P>
The <CODE>\BORDER</CODE> qualifier is valid only if matrix data is entered. By default, the
rectangular boundary of the matrix is outlined within the axes. If you do not want this
boundary to be drawn, use the <CODE>\-BORDER</CODE> qualifier.</P>
<p>
<font size="+1" color="green">Zoom in</font></P>
<P>
By default, the entire range of possible density levels will be used to
determine the minimum and maximum density levels. If the
<CODE>\PARTIAL</CODE> qualifier is used, the
minimum and maximum density levels will be determined by the region contained
within the axes. To zoom in on a particular region for more detail, pre-set
the axis scales, using the
<CODE><a href="../ScalesCommand/scalescommand.htm">SCALES</a></CODE> command, before entering the
<CODE>DENSITY</CODE> command.</p>
<p>
<font size="+1" color="green">Profiles</font></P>
<P>
The qualifiers <CODE>\XPROFILE</CODE> and <CODE>\YPROFILE</CODE> are valid only if matrix
data is entered.</p>
<p>
If the <CODE>\XPROFILE</CODE> qualifier is used,
the columns of the matrix are summed, the sums are normalized to be between
<CODE>0</CODE> and <CODE>1</CODE>, and a histogram of the normalized sums is
drawn horizontally across the top of the graph.</p>
<p>
If the <CODE>\YPROFILE</CODE> qualifier is used,
the rows of the matrix are summed, the sums are normalized to be between
<CODE>0</CODE> and <CODE>1</CODE>, and a histogram of the normalized sums is
drawn vertically along the right side of the graph.</p>
<p>
When a profile is drawn, the axis borders must also be set to allow space for
the profiles, that is, <CODE><a href="../Characteristics/Xaxis/xupperaxis.htm">XUPPERAXIS</a>
</CODE> is set to <CODE>65%</CODE> if a legend is present or <CODE>85%</CODE>
if there is no legend, and <CODE><a href="../Characteristics/Yaxis/yupperaxis.htm">YUPPERAXIS</a>
</CODE> is set to <CODE>80%</CODE>.</p>
<p>
By default, <CODE>XUPPERAXIS</CODE> and <CODE>YUPPERAXIS</CODE> are reset to their former values.
If the <CODE>\-RESET</CODE> qualifier is used, the axis locations are not reset.</p>
<p>
<a href="gradients.htm"><font size="+1" color="olive">GRADIENTS</font></a><br />
<a href="dithering.htm"><font size="+1" color="olive">DITHERING</font></a><br />
<a href="diffusion.htm"><font size="+1" color="olive">DIFFUSION</font></a><br />
<a href="boxes.htm"><font size="+1" color="olive">BOXES</font></a></p>
</BODY>
</HTML>
|
