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| 5 | <title>fromreg.pro (SAXO Documentation Assistant)</title> |
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| 47 | <td width="10%"> |
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| 48 | <a href="fromirr.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="get_gridparams.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">Interpolation/</font></h1> |
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| 58 | <h2>fromreg.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 | interpolate data from a "regular/rectangular grid" to any grid. |
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| 65 | 2 methods available: bilinear and imoms3 |
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| 66 | A "regular/rectangular grid" is defined as a grid for which each longitudes lines have |
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| 67 | the same latitude and each latitudes columns have the same longitude. |
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| 68 | |
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| 69 | |
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| 70 | |
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| 71 | |
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| 72 | |
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| 73 | <a name="#_fromreg"></a> |
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| 74 | |
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| 75 | <h2>fromreg <font size="-1" color="#006633"> |
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| 76 | Interpolation |
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| 77 | </font></h2> |
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| 78 | |
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| 79 | <p><font face="Courier"><i>result = </i>fromreg(<i><a href="#_fromreg_keyword_method">method</a>, <a href="#_fromreg_keyword_datain">datain</a>[, <a href="#_fromreg_keyword_lonin">lonin</a>][, <a href="#_fromreg_keyword_latin">latin</a>][, <a href="#_fromreg_keyword_lonout">lonout</a>], <a href="#_fromreg_keyword_latout">latout</a></i>, <a href="#_fromreg_keyword_WEIG">WEIG</a>=<i>2d array</i>, <a href="#_fromreg_keyword_ADDR">ADDR</a>=<i>2d array</i>, <a href="#_fromreg_keyword_NONORTHERNLINE">NONORTHERNLINE</a>=<i>NONORTHERNLINE</i>, <a href="#_fromreg_keyword_NOSOUTHERNLINE">NOSOUTHERNLINE</a>=<i>NOSOUTHERNLINE</i>)</font></p> |
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| 80 | |
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| 81 | |
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| 82 | |
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| 83 | |
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| 84 | <h3>Return value</h3> |
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| 85 | 2D array the interpolated data |
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| 86 | |
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| 87 | |
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| 88 | |
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| 89 | <h3>Parameters</h3> |
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| 90 | |
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| 91 | |
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| 92 | <a name="#_fromreg_keyword_method"></a> |
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| 93 | <h4>method |
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| 94 | <font size="-1" color="#006633">in</font> |
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| 95 | |
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| 96 | |
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| 97 | <font size="-1" color="#006633">required</font> |
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| 98 | |
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| 99 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>string</i></font> |
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| 100 | |
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| 101 | |
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| 102 | </h4> |
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| 103 | |
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| 104 | |
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| 105 | a string defining the interpolation method. |
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| 106 | must be 'bilinear' or 'imoms3' |
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| 107 | |
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| 108 | |
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| 109 | |
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| 110 | <a name="#_fromreg_keyword_datain"></a> |
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| 111 | <h4>datain |
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| 112 | <font size="-1" color="#006633">in</font> |
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| 113 | |
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| 114 | |
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| 115 | <font size="-1" color="#006633">required</font> |
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| 116 | |
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| 117 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font> |
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| 118 | |
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| 119 | |
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| 120 | </h4> |
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| 121 | |
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| 122 | |
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| 123 | a 2D array the input data to interpolate |
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| 124 | |
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| 125 | |
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| 126 | |
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| 127 | <a name="#_fromreg_keyword_lonin"></a> |
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| 128 | <h4>lonin |
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| 129 | <font size="-1" color="#006633">in</font> |
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| 130 | |
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| 131 | <font size="-1" color="#006633">optional</font> |
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| 132 | |
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| 133 | |
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| 134 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>1d or 2d array</i></font> |
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| 135 | |
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| 136 | |
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| 137 | </h4> |
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| 138 | |
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| 139 | |
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| 140 | 1D or 2D array defining the longitude of the input data |
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| 141 | |
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| 142 | |
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| 143 | |
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| 144 | <a name="#_fromreg_keyword_latin"></a> |
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| 145 | <h4>latin |
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| 146 | <font size="-1" color="#006633">in</font> |
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| 147 | |
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| 148 | <font size="-1" color="#006633">optional</font> |
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| 149 | |
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| 150 | |
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| 151 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>1d or 2d array</i></font> |
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| 152 | |
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| 153 | |
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| 154 | </h4> |
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| 155 | |
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| 156 | |
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| 157 | 1D or 2D array defining the latitude of the input data |
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| 158 | |
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| 159 | |
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| 160 | |
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| 161 | <a name="#_fromreg_keyword_lonout"></a> |
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| 162 | <h4>lonout |
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| 163 | <font size="-1" color="#006633">in</font> |
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| 164 | |
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| 165 | <font size="-1" color="#006633">optional</font> |
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| 166 | |
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| 167 | |
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| 168 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>1d or 2d array</i></font> |
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| 169 | |
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| 170 | |
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| 171 | </h4> |
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| 172 | |
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| 173 | |
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| 174 | 1D or 2D array defining the longitude of the output data |
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| 175 | |
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| 176 | |
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| 177 | |
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| 178 | <a name="#_fromreg_keyword_latout"></a> |
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| 179 | <h4>latout |
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| 180 | <font size="-1" color="#006633">in</font> |
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| 181 | |
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| 182 | |
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| 183 | <font size="-1" color="#006633">required</font> |
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| 184 | |
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| 185 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>1d or 2d array</i></font> |
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| 186 | |
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| 187 | |
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| 188 | </h4> |
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| 189 | |
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| 190 | |
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| 191 | 1D or 2D array defining the latitude of the output data |
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| 192 | |
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| 193 | |
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| 194 | |
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| 195 | |
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| 196 | |
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| 197 | <h3>Keywords</h3> |
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| 198 | |
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| 199 | |
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| 200 | <a name="#_fromreg_keyword_WEIG"></a> |
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| 201 | <h4>WEIG |
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| 202 | |
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| 203 | |
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| 204 | |
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| 205 | |
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| 206 | |
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| 207 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font> |
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| 208 | |
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| 209 | |
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| 210 | </h4> |
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| 211 | |
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| 212 | |
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| 213 | (see ADDR) |
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| 214 | |
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| 215 | |
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| 216 | <a name="#_fromreg_keyword_ADDR"></a> |
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| 217 | <h4>ADDR |
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| 218 | |
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| 219 | |
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| 220 | |
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| 221 | |
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| 222 | |
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| 223 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font> |
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| 224 | |
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| 225 | |
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| 226 | </h4> |
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| 227 | |
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| 228 | |
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| 229 | 2D arrays, weig and addr are the weight and addresses used to |
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| 230 | perform the interpolation: |
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| 231 | dataout = total(weig*datain[addr], 1) |
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| 232 | dataout = reform(dataout, jpio, jpjo, /over) |
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| 233 | Those keywords can be set to named variables (that are undefined or equal to 0) into which the |
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| 234 | values will be copied when the current routine exits. Next, they can be used to perform |
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| 235 | the interpolation without computing again those 2 parameters. In that |
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| 236 | case, lonin, latin, lonout and latout are not necessary. |
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| 237 | |
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| 238 | |
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| 239 | <a name="#_fromreg_keyword_NONORTHERNLINE"></a> |
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| 240 | <h4>NONORTHERNLINE |
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| 241 | |
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| 242 | |
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| 243 | |
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| 244 | |
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| 245 | |
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| 246 | |
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| 247 | |
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| 248 | |
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| 249 | </h4> |
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| 250 | |
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| 251 | |
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| 252 | activate if you don't want to take into account the northern line |
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| 253 | of the input data when performing the interpolation. |
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| 254 | |
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| 255 | |
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| 256 | <a name="#_fromreg_keyword_NOSOUTHERNLINE"></a> |
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| 257 | <h4>NOSOUTHERNLINE |
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| 258 | |
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| 259 | |
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| 260 | |
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| 261 | |
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| 262 | |
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| 263 | |
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| 264 | |
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| 265 | |
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| 266 | </h4> |
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| 267 | |
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| 268 | |
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| 269 | activate if you don't want to take into account the southern line |
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| 270 | of the input data when performing the interpolation. |
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| 271 | |
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| 272 | |
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| 273 | |
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| 274 | |
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| 275 | <h3>Examples</h3> |
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| 276 | |
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| 277 | IDL> topa = fromreg('bilinear', tncep, xncep, yncep, glamt, gphit) |
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| 278 | |
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| 279 | or |
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| 280 | |
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| 281 | IDL> t1opa = fromreg('bilinear', t1ncep, xncep, yncep, glamt, gphit, WEIG = a, ADDR = b) |
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| 282 | IDL> help, a, b |
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| 283 | IDL> t2opa = fromreg('bilinear', t2ncep, xncep, WEIG = a, ADDR = b) |
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| 284 | |
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| 285 | <h3>Version history</h3> |
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| 286 | |
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| 287 | <h4>Version</h4> $Id: fromreg.pro 157 2006-08-21 09:01:50Z navarro $ |
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| 288 | |
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| 289 | <h4>History</h4> |
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| 290 | November 2005: Sebastien Masson (smasson@lodyc.jussieu.fr) |
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| 291 | |
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| 292 | |
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| 293 | |
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| 294 | <h3>Known issues</h3> |
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| 295 | |
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| 296 | |
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| 297 | |
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| 298 | <h4>Restrictions</h4> |
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| 299 | We supposed the data are located on a sphere, with a periodicity along the |
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| 300 | longitude. |
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| 301 | |
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| 302 | |
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| 309 | |
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| 310 | |
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| 311 | <font size="-3"><p> </p></font> |
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| 312 | <hr size="1" color="#CCCCCC"/> |
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| 313 | |
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| 314 | |
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| 315 | |
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| 316 | |
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| 317 | <p><font color="gray" size="-3"> Produced by IDLdoc 2.0 on Tue Aug 29 14:49:17 2006.</font></p> |
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| 318 | |
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| 319 | </body> |
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| 320 | </html> |
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