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<DIV>I am looking for a description of the actual interpolation method used to
convert data points to RRAs in the specific case of 1:1 correspondence.</DIV>
<DIV> </DIV>
<DIV>Rate generation data:</DIV>
<DIV>
<DIV>
<DIV>920805000:10</DIV>
<DIV>920805300:20</DIV>
<DIV>920805600:10</DIV>
<DIV>920805900:10</DIV>
<DIV> </DIV>
<DIV>Generated data:</DIV></DIV></DIV>
<DIV>
<DIV>920805000:000 </DIV>
<DIV>920805300:3000 </DIV>
<DIV>920805600:9000 </DIV>
<DIV>920805900:12000</DIV></DIV>
<DIV> </DIV>
<DIV>Example data:</DIV>
<DIV>920805000:000 </DIV>
<DIV>920805305:3100 </DIV>
<DIV>920805603:9030 </DIV>
<DIV>920805907:12070</DIV>
<DIV> </DIV>
<DIV>RRD results:</DIV>
<DIV>
<!-- 1999-03-07 05:10:00 CST / 920805000 --> <row><v> NaN
</v></row><BR>
<!-- 1999-03-07 05:15:00 CST / 920805300 --> <row><v>
1.0163934426e+01
</v></row><BR>
<!-- 1999-03-07 05:20:00 CST / 920805600 --> <row><v>
1.9737072285e+01
</v></row><BR>
<!-- 1999-03-07 05:25:00 CST / 920805900 --> <row><v>
1.0098993289e+01 </v></row><BR></DIV>
<DIV>The first data point is what would be expected.</DIV>
<DIV>ie. 3100/305.= 10.163934426</DIV>
<DIV> </DIV>
<DIV>For the additional data point:</DIV>
<DIV>5930/298 = 19.899328859</DIV>
<DIV> </DIV>
<DIV>Then it look like we first interpolate the data point for </DIV>
<DIV>92805300 = 3049.1803279</DIV>
<DIV> </DIV>
<DIV>That gives</DIV>
<DIV>5980.8197213/303=19.738678948</DIV>
<DIV>Which is close but still differs in the 5th decimal place.</DIV>
<DIV> </DIV>
<DIV>If we do a full second degree interpolation:</DIV>
<DIV>92805300 = 3049.1803279</DIV>
<DIV>
<DIV>92805600 = 19.899328859*295+3100 = 8970.302013405</DIV></DIV>
<DIV>So </DIV>
<DIV>8970.302013405-3049.1803279=5921.1216855</DIV>
<DIV>5921.1216855/300 = 19.737072285</DIV>
<DIV> </DIV>
<DIV>This seems to be what is done but I have not seen a description
anywhere.</DIV>
<DIV>Is this indeed what is done?</DIV>
<DIV>First interpolating the data points and then calculating the slope?</DIV>
<DIV>The final data point below seems to confirm this.</DIV>
<DIV>Could this be added to the FAQ or the documentation some where?</DIV>
<DIV> </DIV>
<DIV>Mack</DIV>
<DIV> </DIV>
<DIV>Ammendum:</DIV>
<DIV>For the final data point.</DIV>
<DIV>3040/304=10</DIV>
<DIV>
<DIV>92805900 = 10*297+9030 =12000</DIV>
<DIV>12000-8970.302013405=3029.697986595</DIV>
<DIV>3029.697986595/300=10.098993289</DIV></DIV></FONT><br/><font style="color:black;font:normal 10pt arial,san-serif;"> <hr style="margin-top:10px"/><B>A Good Credit Score is 700 or Above. <A HREF="http://pr.atwola.com/promoclk/100126575x1221421323x1201417385/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DAprilfooterNO62"> See yours in just 2 easy steps!</A></B></font></DIV></BODY></HTML>