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| 3 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
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| 4 | <head> |
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| 5 | <title>extrac2.pro (SAXO Documentation Assistant)</title> |
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| 6 | </head> |
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| 46 | <tr> |
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| 47 | <td width="10%"> |
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| 48 | <a href="different.html"><img src="./../prev.gif" border="0" alt="Previous"></a></td> |
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| 49 | <td width="80%" align="center" valign="center"> |
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| 50 | <font size=-1><i>SAXO Documentation Assistant</i>: <a href="./../home.html">Overview</a></font></td> |
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| 51 | <td width="10%" align="right"> |
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| 52 | <a href="inter.html"><img src="./../next.gif" border="0" alt="Next"></a></td> |
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| 53 | </tr> |
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| 54 | </table> |
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| 55 | |
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| 56 | |
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| 57 | <h1><font size="-2">Matrix/</font></h1> |
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| 58 | <h2>extrac2.pro</h2> |
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| 59 | |
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| 60 | <dl> |
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| 61 | </dl> |
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| 62 | |
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| 63 | |
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| 64 | extraction of subdomains of matrices; |
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| 65 | Even if the subdomain is "pierced" (see the example) |
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| 66 | By default, IDL can make extractions of subdomain: |
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| 67 | |
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| 68 | IDL> a=indgen(5,5) |
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| 69 | IDL> print, a |
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| 70 | 0 1 2 3 4 |
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| 71 | 5 6 7 8 9 |
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| 72 | 10 11 12 13 14 |
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| 73 | 15 16 17 18 19 |
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| 74 | 20 21 22 23 24 |
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| 75 | IDL> print, a[[0,2],3] |
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| 76 | 15 17 |
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| 77 | IDL> print, a[[0,2],*] |
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| 78 | 0 2 |
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| 79 | 5 7 |
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| 80 | 10 12 |
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| 81 | 15 17 |
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| 82 | 20 22 |
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| 83 | but |
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| 84 | IDL> print, a[[0,2],[3,4]] |
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| 85 | 15 22 |
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| 86 | while |
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| 87 | IDL> print, extrac2(a,[0,2],[3,4]) |
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| 88 | 15 17 |
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| 89 | 20 22 |
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| 90 | |
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| 91 | |
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| 92 | |
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| 93 | |
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| 94 | |
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| 95 | <a name="#_extrac2"></a> |
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| 96 | |
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| 97 | <h2>extrac2 <font size="-1" color="#006633"> |
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| 98 | Utilities |
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| 99 | </font></h2> |
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| 100 | |
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| 101 | <p><font face="Courier"><i>result = </i>extrac2(<i><a href="#_extrac2_keyword_array">array</a>, <a href="#_extrac2_keyword_index1">index1</a>, <a href="#_extrac2_keyword_index2">index2</a>, <a href="#_extrac2_keyword_index3">index3</a>, <a href="#_extrac2_keyword_index4">index4</a></i>)</font></p> |
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| 102 | |
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| 103 | |
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| 104 | |
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| 105 | |
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| 106 | <h3>Return value</h3> |
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| 107 | a matrix 1,2,3 or 4d extract from input array |
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| 108 | |
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| 109 | |
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| 110 | |
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| 111 | <h3>Parameters</h3> |
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| 112 | |
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| 113 | |
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| 114 | <a name="#_extrac2_keyword_array"></a> |
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| 115 | <h4>array |
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| 116 | <font size="-1" color="#006633">in</font> |
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| 117 | |
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| 118 | |
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| 119 | <font size="-1" color="#006633">required</font> |
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| 120 | |
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| 121 | |
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| 122 | |
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| 123 | |
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| 124 | </h4> |
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| 125 | |
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| 126 | |
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| 127 | a 1,2,3 or 4 dim input array |
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| 128 | |
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| 129 | |
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| 130 | |
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| 131 | <a name="#_extrac2_keyword_index1"></a> |
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| 132 | <h4>index1 |
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| 133 | <font size="-1" color="#006633">in</font> |
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| 134 | |
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| 135 | |
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| 136 | <font size="-1" color="#006633">required</font> |
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| 137 | |
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| 138 | |
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| 139 | |
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| 140 | |
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| 141 | </h4> |
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| 142 | |
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| 143 | |
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| 144 | can have 2 forms: |
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| 145 | 1)a vector containing indexes of lines we want to keep |
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| 146 | 2)the string '*' if we want to keep all lines. |
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| 147 | |
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| 148 | |
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| 149 | |
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| 150 | <a name="#_extrac2_keyword_index2"></a> |
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| 151 | <h4>index2 |
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| 152 | <font size="-1" color="#006633">in</font> |
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| 153 | |
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| 154 | |
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| 155 | <font size="-1" color="#006633">required</font> |
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| 156 | |
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| 157 | |
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| 158 | |
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| 159 | |
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| 160 | </h4> |
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| 161 | |
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| 162 | |
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| 163 | the same thing that index1 but for dim 2. |
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| 164 | |
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| 165 | |
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| 166 | |
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| 167 | <a name="#_extrac2_keyword_index3"></a> |
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| 168 | <h4>index3 |
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| 169 | <font size="-1" color="#006633">in</font> |
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| 170 | |
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| 171 | |
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| 172 | <font size="-1" color="#006633">required</font> |
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| 173 | |
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| 174 | |
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| 175 | |
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| 176 | |
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| 177 | </h4> |
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| 178 | |
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| 179 | |
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| 180 | the same thing that index1 but for dim 3. |
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| 181 | |
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| 182 | |
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| 183 | |
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| 184 | <a name="#_extrac2_keyword_index4"></a> |
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| 185 | <h4>index4 |
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| 186 | <font size="-1" color="#006633">in</font> |
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| 187 | |
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| 188 | |
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| 189 | <font size="-1" color="#006633">required</font> |
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| 190 | |
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| 191 | |
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| 192 | |
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| 193 | |
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| 194 | </h4> |
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| 195 | |
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| 196 | |
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| 197 | the same thing that index1 but for dim 4. |
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| 198 | |
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| 199 | |
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| 200 | |
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| 201 | |
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| 202 | |
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| 203 | |
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| 204 | <h3>Examples</h3> |
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| 205 | I have a dim 2 matrix named A. I want extract a small intersection |
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| 206 | matrix 2d of the line 2,3 and 7 and of the column 0 and 1: |
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| 207 | |
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| 208 | IDL> res=extrac2(A,[2,3,7],[0,1]) |
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| 209 | |
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| 210 | other ex: |
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| 211 | IDL> print, a |
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| 212 | a b c |
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| 213 | d e f |
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| 214 | g h i |
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| 215 | IDL> print, extrac2(a,[0,2],[0,2]) |
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| 216 | a c |
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| 217 | g i |
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| 218 | |
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| 219 | <h3>Version history</h3> |
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| 220 | |
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[168] | 221 | <h4>Version</h4> $Id: extrac2.pro 163 2006-08-29 12:59:46Z navarro $ |
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[163] | 222 | |
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| 223 | <h4>History</h4> Sebastien Masson (smasson@lodyc.jussieu.fr) |
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| 224 | 12/1/1999 |
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| 225 | 29/4/1999: correction of a bug and complement of the heading |
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| 226 | |
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| 227 | |
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| 228 | |
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| 229 | <h3>Known issues</h3> |
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| 230 | |
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| 231 | |
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| 232 | |
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| 233 | <h4>Restrictions</h4> |
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| 234 | -1 in case of mistake |
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| 245 | <font size="-3"><p> </p></font> |
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| 246 | <hr size="1" color="#CCCCCC"/> |
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[187] | 251 | <p><font color="gray" size="-3"> Produced by IDLdoc 2.0.</font></p> |
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[163] | 252 | |
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| 253 | </body> |
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[200] | 254 | </html> |
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