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trunk/SRC/Documentation/idldoc_html_output/Interpolation/spl_fstdrv.html
r89 r101 87 87 </div> 88 88 89 <div id="file_comments"></div> 90 91 92 93 94 95 96 97 98 99 <div id="routine_details"> 100 101 102 <div class="routine_details" id="_spl_fstdrv"> 103 104 <h2><a class="top" href="#container">top</a>spl_fstdrv </h2> 105 106 <p class="header"> 107 <span class="result">result = </span>spl_fstdrv(<span class="result"><a href="#_spl_fstdrv_param_x">x</a>, <a href="#_spl_fstdrv_param_y">y</a>, <a href="#_spl_fstdrv_param_yscd">yscd</a>, <a href="#_spl_fstdrv_param_x2">x2</a></span>)</p> 108 109 <div class="comments"> 110 NAME:spl_fstdrv 111 112 PURPOSE: SPL_FSTDRV returns the values of the first derivative of 89 <div id="file_comments"> SPL_FSTDRV returns the values of the first derivative of 113 90 the interpolating function at the points X2i. it is a double 114 91 precision array. … … 119 96 of X2. The interpolation method is based on cubic spline, corrected 120 97 in a way that interpolated value are also in ascending order 121 122 CATEGORY: 123 124 CALLING SEQUENCE: y2 = spl_fstdrv(x, y, yscd, x2) 125 126 INPUTS: 127 128 x: An n-element (at least 2) input vector that specifies the 98 </div> 99 100 101 102 103 104 105 106 107 108 <div id="routine_details"> 109 110 111 <div class="routine_details" id="_spl_fstdrv"> 112 113 <h2><a class="top" href="#container">top</a>spl_fstdrv </h2> 114 115 <p class="header"> 116 <span class="result">result = </span>spl_fstdrv(<span class="result"><a href="#_spl_fstdrv_param_x">x</a>, <a href="#_spl_fstdrv_param_y">y</a>, <a href="#_spl_fstdrv_param_yscd">yscd</a>, <a href="#_spl_fstdrv_param_x2">x2</a></span>)</p> 117 118 <div class="comments"> 119 </div> 120 121 <h3>Return value</h3><div class="value"> 122 123 y2: f'(x2) = y2. 124 125 </div> 126 127 128 <h3>Parameters</h3> 129 130 131 <h4 id="_spl_fstdrv_param_x">x 132 <span class="attr">in</span> 133 134 135 <span class="attr">required</span> 136 137 138 139 140 </h4> 141 142 <div class="comments"> An n-element (at least 2) input vector that specifies the 129 143 tabulate points in ascending order. 130 131 y: f(x) = y. An n-element input vector that specifies the values 144 </div> 145 146 <h4 id="_spl_fstdrv_param_y">y 147 <span class="attr">in</span> 148 149 150 <span class="attr">required</span> 151 152 153 154 155 </h4> 156 157 <div class="comments"> f(x) = y. An n-element input vector that specifies the values 132 158 of the tabulated function F(Xi) corresponding to Xi. 133 134 yscd: The output from SPL_INIT for the specified X and Y. 135 136 x2: The input values for which the first derivative values are 159 </div> 160 161 <h4 id="_spl_fstdrv_param_yscd">yscd 162 <span class="attr">in</span> 163 164 165 <span class="attr">required</span> 166 167 168 169 170 </h4> 171 172 <div class="comments"> The output from SPL_INIT for the specified X and Y. 173 </div> 174 175 <h4 id="_spl_fstdrv_param_x2">x2 176 <span class="attr">in</span> 177 178 179 <span class="attr">required</span> 180 181 182 183 184 </h4> 185 186 <div class="comments"> The input values for which the first derivative values are 137 187 desired. X can be scalar or an array of values. 138 139 KEYWORD PARAMETERS: none 140 141 OUTPUTS: 142 143 y2: f'(x2) = y2. 144 145 COMMON BLOCKS: none 146 147 SIDE EFFECTS: ? 148 149 RESTRICTIONS: ? 150 151 EXAMPLE: 152 153 MODIFICATION HISTORY:</div> 154 155 156 157 158 <h3>Parameters</h3> 159 160 161 <h4 id="_spl_fstdrv_param_x">x 162 163 164 165 166 167 168 169 170 </h4> 171 172 <div class="comments"></div> 173 174 <h4 id="_spl_fstdrv_param_y">y 175 176 177 178 179 180 181 182 183 </h4> 184 185 <div class="comments"></div> 186 187 <h4 id="_spl_fstdrv_param_yscd">yscd 188 189 190 191 192 193 194 195 196 </h4> 197 198 <div class="comments"></div> 199 200 <h4 id="_spl_fstdrv_param_x2">x2 201 202 203 204 205 206 207 208 209 </h4> 210 211 <div class="comments"></div> 212 213 214 215 216 217 218 219 220 221 222 188 </div> 189 190 191 192 193 194 195 <h3>Examples</h3><div class="value"> y2 = spl_fstdrv(x, y, yscd, x2) 196 </div> 197 <h3>Version history</h3> 198 199 200 <h4>History</h4><div class="value"> 201 Sebastien Masson (smasson@lodyc.jussieu.fr): May 2005</div> 223 202 224 203
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