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- 03/21/07 10:14:37 (17 years ago)
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trunk/SRC/Documentation/idldoc_assistant_output/ToBeReviewed/CALCULS/norme.html
r200 r234 61 61 </dl> 62 62 63 63 64 64 calculate the norm of a field of vectors, then make a possible average. 65 65 Comment 1: The field of vector can be, 2d:xy, 3d: xyz or xyt, 66 66 4d: xyzt 67 67 Comment 2: 68 The calculation of the norm is made before the possible spatial or 69 temporal average because the average of the norm is not equal to the 68 The calculation of the norm is made before the possible spatial or 69 temporal average because the average of the norm is not equal to the 70 70 norm of averages 71 72 71 73 72 … … 81 80 </font></h2> 82 81 83 <p><font face="Courier"><i>result = </i>norme(<i><a href="#_norme_keyword_composanteu">composanteu</a>, <a href="#_norme_keyword_composantev">composantev</a></i>, <a href="#_norme_keyword_BOXZOOM">BOXZOOM</a>=<i>BOXZOOM</i>, <a href="#_norme_keyword_DIREC">DIREC</a>=<i>DIREC</i>, <a href="#_norme_keyword__ extra">_extra</a>=<i>_extra</i>)</font></p>82 <p><font face="Courier"><i>result = </i>norme(<i><a href="#_norme_keyword_composanteu">composanteu</a>, <a href="#_norme_keyword_composantev">composantev</a></i>, <a href="#_norme_keyword_BOXZOOM">BOXZOOM</a>=<i>BOXZOOM</i>, <a href="#_norme_keyword_DIREC">DIREC</a>=<i>DIREC</i>, <a href="#_norme_keyword__EXTRA">_EXTRA</a>=<i>_EXTRA</i>)</font></p> 84 83 85 84 … … 146 145 147 146 148 boxzoom on which do the average (by default the domain selected 147 boxzoom on which do the average (by default the domain selected 149 148 by the last domdef done) 150 149 … … 164 163 165 164 't' 'x' 'y' 'z' 'xys' 'xz' 'yz' 'xyz' 'xt' 'yt' 'zt' 'xyt' 166 'xzt' 'yzt' 'xyzt' Direction on which do averages 167 168 169 <a name="#_norme_keyword__ extra"></a>170 <h4>_ extra 171 172 173 174 175 176 177 178 179 </h4> 180 181 182 183 184 185 <h3>Examples</h3> 186 To calculate the average of the norme of streams on all the domain 165 'xzt' 'yzt' 'xyzt' Direction on which do averages 166 167 168 <a name="#_norme_keyword__EXTRA"></a> 169 <h4>_EXTRA 170 171 172 173 174 175 176 177 178 </h4> 179 180 181 182 183 184 <h3>Examples</h3><pre> 185 To calculate the average of the norme of streams on all the domain 187 186 between 0 et 50: 188 187 IDL> res=norme(un,vn,boxzoom=[0,50],dir='xyz') 189 188 190 < h3>Version history</h3>189 </pre><h3>Version history</h3> 191 190 192 191 <h4>Version</h4> 193 $Id: norme.pro 163 2006-08-29 12:59:46Z navarro$192 $Id: norme.pro 232 2007-03-20 16:59:36Z pinsard $ 194 193 195 194 <h4>History</h4> … … 203 202 204 203 205 <h4>Restrictions</h4> 206 The norm is calculated on points TTo do this calculation, we average 207 field U and Von points T before calculate the norme. At the edge of 208 coast and of domain, we can not calculate fields U and V at points T, 209 that is why these points are at value !values.f_nan. 210 211 When we calculate on a reduce geographic domain, field U and V have not 212 necessarily the same number of point. In this case, we recut U and V to 213 keep only common points. We profit of this to redo a domdef which redefine 204 <h4>Restrictions</h4> 205 The norm is calculated on points TTo do this calculation, we average 206 field U and Von points T before calculate the norme. At the edge of 207 coast and of domain, we can not calculate fields U and V at points T, 208 that is why these points are at value !values.f_nan. 209 210 When we calculate on a reduce geographic domain, field U and V have not 211 necessarily the same number of point. In this case, we recut U and V to 212 keep only common points. We profit of this to redo a domdef which redefine 214 213 a geographic domain on which fields U and V are extracted on same points 215 214 216 217 To know what type of array we work with, we test its size and dates 218 gave by time[0] and time[jpt-1] to know if thee is a temporal dimension. 219 Before to start norme, make sure that time and jpt are defined how 220 they have to! 215 To know what type of array we work with, we test its size and dates 216 gave by time[0] and time[jpt-1] to know if thee is a temporal dimension. 217 Before to start norme, make sure that time and jpt are defined how 218 they have to! 221 219 222 220
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