- Timestamp:
- 03/21/07 10:14:37 (17 years ago)
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trunk/SRC/Documentation/idldoc_html_output/Computation/grad.html
r200 r234 111 111 <span class="result">result = </span>grad(<span class="result"><a href="#_grad_param_field">field</a>, <a href="#_grad_param_direc">direc</a></span>)</p> 112 112 113 <div class="comments"></div> 113 <div class="comments"> 114 </div> 114 115 115 116 <h3>Return value</h3><div class="preformat"> RES {type=2D, 3D or 4D array} … … 136 137 3D (xyz or yt) or 4D (xyzt) array or a structure readable by litchamp 137 138 and containing a 2D (xy), 3D (xyz or yt) or 4D (xyzt) array. 138 note that the dimension of the arr y must suit the domain dimension.139 note that the dimension of the array must suit the domain dimension. 139 140 </div> 140 141 … … 167 168 168 169 <h4>Version</h4><div class="preformat"> 169 $Id: grad.pro 168 2006-09-06 10:46:29Z pinsard $170 $Id: grad.pro 232 2007-03-20 16:59:36Z pinsard $ 170 171 </div> 171 172 <h4>History</h4><div class="preformat"> … … 179 180 180 181 <h4>Restrictions</h4><div class="preformat"> 181 - Works only for Arakawa C-grid. 182 - Works only for Arakawa C-grid. 182 183 - When computing the gradient, the result is not on the same grid point 183 184 than the input data. In consequence, we update, vargrid and the grid position 184 185 parameters (firstx[tuvf], lastx[tuvf], nx[tuvf], firsty[tuvf], lasty[tuvf], 185 186 ny[tuvf], firstz[tw], lastz[tw], nz[tw]). 186 - points that cannot be computed (domain bo ndaries, coastline) are set to NaN187 - points that cannot be computed (domain boundaries, coastline) are set to NaN 187 188 - the common variable jpt is used to differ xyz (jpt=1) and xyt (jpt=1) cases. 188 189 </div> … … 192 193 193 194 <h4>Uses routines</h4><div class="preformat"> 194 cm_4cal, cm_4data, cm_4mmesh 195 cm_4cal, cm_4data, cm_4mmesh 195 196 </div> 196 197
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