source: trunk/SRC/Documentation/idldoc_assistant_output/Matrix/different.html @ 402

Last change on this file since 402 was 402, checked in by smasson, 15 years ago

update documentation
File size: 3.7 KB
RevLine 
[163]1
2
3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
4  <head>
5    <title>different.pro (SAXO Documentation Assistant)</title>
6  </head>
7
8  <body text="#000000" bgcolor="#FFFFFF">
9
10   
11<!-- Navbar template takes a structure with the following fields:
12       overview_href :
13       overview_selected :
14       dir_overview_href :
15       dir_overview_selected :
16       categories_href :
17       categories_selected :
18       index_href :
19       index_selected :
20       search_href :
21       search_selected :
22       file_selected :
23       source_href :
24       source_selected :
25       help_href :
26       help_selected :
27       etc_selected :
28
29       prev_file_href :
30       next_file_href :
31
32       view_single_page_href :
33       view_frames_href :
34
35       summary_fields_href :
36       summary_routine_href :
37       details_routine_href :
38
39       title :
40       subtitle :
41       user :
42-->
43
44
45<table border="0" cellpadding="0" cellspacing="0" width="98%" bgcolor="#F0F0FF" valign="bottom">
46  <tr>
47    <td width="10%">
48<a href="cmset_op.html"><img src="./../prev.gif" border="0" alt="Previous"></a></td>
49    <td width="80%" align="center" valign="center">
50<font size=-1><i>SAXO Documentation Assistant</i>: <a href="./../home.html">Overview</a></font></td>
51    <td width="10%" align="right">
52<a href="extrac2.html"><img src="./../next.gif" border="0" alt="Next"></a></td>
53  </tr>
54</table>
55
56
57    <h1><font size="-2">Matrix/</font></h1>
58    <h2>different.pro</h2>
59
60    <dl>
61    </dl>
62
[234]63   
[402]64 find the different elements of 2 matrixes of positive whole numbers.
[163]65
[402]66 see also <a href="..//Matrix/union.html">union</a> and <a href="..//Matrix/inter.html">inter</a>.
[163]67
[402]68
[163]69   
70
71     
72      <a name="#_different"></a>
73
74      <h2>different  <font size="-1" color="#006633">
75 Calculation
76</font></h2>
77
78      <p><font face="Courier"><i>result = </i>different(<i><a href="#_different_keyword_a">a</a>, <a href="#_different_keyword_b">b</a></i>)</font></p>
79
80   
81
82
[234]83    <h3>Return value</h3>
[402]84 an array containing the set of values in only a.
[163]85
[402]86 The empty set is denoted by an array with the first element equal to
87 -1.
[163]88
[402]89
[163]90   
91    <h3>Parameters</h3>
92   
93
94    <a name="#_different_keyword_a"></a>
95    <h4>a&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
96      <font size="-1" color="#006633">in</font>
97     
98     
99      <font size="-1" color="#006633">required</font>
100     
101     
102     
103     
104    </h4>
105
[234]106   
107 arrays of positive integers, which need
[402]108 not be sorted. Duplicate elements are ignored, as they have no
109 effect on the result
[163]110
111   
112
113    <a name="#_different_keyword_b"></a>
114    <h4>b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
115      <font size="-1" color="#006633">in</font>
116     
117     
118      <font size="-1" color="#006633">required</font>
119     
120     
121     
122     
123    </h4>
124
[234]125   
126 see a
[163]127
128   
129   
130
131   
132
[234]133    <h3>Examples</h3><pre>
[163]134
[402]135   IDL> a = [2,4,6,8]
136   IDL> b = [6,1,3,2]
[163]137
[402]138   IDL> res=different(a,b)
139              4           8
140 Right because 4 and 8 are in a but not in b !
141
142   IDL> res=different(b,a)
143   IDL> print,res
144              1           3
145
146 Right because 1 and 3 are in b but not in a !
147
[234]148    </pre><h3>Version history</h3>
[163]149   
[234]150    <h4>Version</h4>
[402]151 $Id: different.pro 373 2008-08-08 14:11:31Z pinsard $
[163]152
[234]153    <h4>History</h4>
154 <a href="http://www.dfanning.com/tips/set_operations.html"/>
[163]155
156   
157
158    <h3>Known issues</h3>
159   
160   
161   
[234]162    <h4>Restrictions</h4>
[163]163 These functions will not be efficient on sparse sets with wide
164 ranges, as they trade memory for efficiency. The HISTOGRAM function
165 is used, which creates arrays of size equal to the range of the
166 resulting set.
167
168
169   
170   
171   
172   
173   
174   
175   
176
177    <font size="-3"><p>&nbsp;</p></font>
178    <hr size="1" color="#CCCCCC"/>
179     
180
181   
182
[187]183    <p><font color="gray" size="-3">&nbsp;&nbsp;Produced by IDLdoc 2.0.</font></p>
[163]184
185  </body>
[249]186</html>
Note: See TracBrowser for help on using the repository browser.