- Timestamp:
- 04/06/07 10:35:17 (17 years ago)
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trunk/SRC/Documentation/idldoc_assistant_output/Interpolation/spl_fstdrv.html
r234 r242 62 62 63 63 64 SPL_FSTDRVreturns the values of the first derivative of64 returns the values of the first derivative of 65 65 the interpolating function at the points X2i. It is a double 66 66 precision array. 67 67 68 68 Given the arrays X and Y, which tabulate a function (with the X[i] 69 ANDY[i] in ascending order), and given an input value X2, the70 SPL_INCR function returns an interpolated value for the given values71 of X2. The interpolation method is based on cubic spline, corrected72 in a way that interpolated value are also in ascending order 69 and Y[i] in ascending order), and given an input value X2, the 70 <a href=".//spl_incr.html">spl_incr</a> function returns an interpolated value for the given 71 values of X2. The interpolation method is based on cubic spline, corrected 72 in a way that interpolated value are also in ascending order. 73 73 74 74 … … 106 106 107 107 108 An n-element (at least 2) input vector that specifies the108 An n-elements (at least 2) input vector that specifies the 109 109 tabulate points in ascending order. 110 110 … … 124 124 125 125 126 f(x) = y. An n-element input vector that specifies the values126 f(x) = y. An n-elements input vector that specifies the values 127 127 of the tabulated function F(Xi) corresponding to Xi. 128 128 … … 142 142 143 143 144 The output from SPL_INITfor the specified X and Y.144 The output from <proidl>SPL_INIT</pro> for the specified X and Y. 145 145 146 146 … … 153 153 <font size="-1" color="#006633">required</font> 154 154 155 155 <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i> scalar or array</i></font> 156 156 157 157 … … 160 160 161 161 The input values for which the first derivative values are desired. 162 X can be scalar or an array of values.163 162 164 163 … … 173 172 174 173 <h4>Version</h4> 175 $Id: spl_fstdrv.pro 23 1 2007-03-19 17:15:51Z pinsard $174 $Id: spl_fstdrv.pro 238 2007-03-27 13:43:18Z pinsard $ 176 175 177 176 <h4>History</h4>
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