<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 2008 (1.71) original version by: Nikos Drakos, CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Error estimates</TITLE> <META NAME="description" CONTENT="Error estimates"> <META NAME="keywords" CONTENT="gnuplot"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2008"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="gnuplot.css"> <LINK REL="next" HREF="node100.html"> <LINK REL="previous" HREF="node96.html"> <LINK REL="up" HREF="node94.html"> <LINK REL="next" HREF="node98.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html2369" HREF="node98.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html2363" HREF="node94.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html2357" HREF="node96.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html2365" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <A NAME="tex2html2367" HREF="node467.html"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.png"></A> <BR> <B> Next:</B> <A NAME="tex2html2370" HREF="node98.html">Statistical overview</A> <B> Up:</B> <A NAME="tex2html2364" HREF="node94.html">Fit</A> <B> Previous:</B> <A NAME="tex2html2358" HREF="node96.html">Short introduction</A> <B> <A NAME="tex2html2366" HREF="node1.html">Contents</A></B> <B> <A NAME="tex2html2368" HREF="node467.html">Index</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION04063000000000000000"></A> <A NAME="commands_fit_error_estimates"></A><A NAME="fit_error_estimates"></A><A NAME="fit_errors"></A> <BR> Error estimates </H2> In <B>fit</B>, the term <TT>"</TT>error<TT>"</TT> is used in two different contexts, data error estimates and parameter error estimates. <P> Data error estimates are used to calculate the relative weight of each data point when determining the weighted sum of squared residuals, WSSR or chisquare. They can affect the parameter estimates, since they determine how much influence the deviation of each data point from the fitted function has on the final values. Some of the <B>fit</B> output information, including the parameter error estimates, is more meaningful if accurate data error estimates have been provided. <P> The 'statistical overview' describes some of the <B>fit</B> output and gives some background for the 'practical guidelines'. <BR><HR> <!--Table of Child-Links--> <A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A> <UL> <LI><A NAME="tex2html2371" HREF="node98.html">Statistical overview</A> <LI><A NAME="tex2html2372" HREF="node99.html">Practical guidelines</A> </UL> <!--End of Table of Child-Links--> <BR><HR> <ADDRESS> 2010-08-17 </ADDRESS> </BODY> </HTML>
