<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998) originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), 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>Input data format</TITLE> <META NAME="description" CONTENT="Input data format"> <META NAME="keywords" CONTENT="vol2"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <LINK REL="STYLESHEET" HREF="vol2.css"> <LINK REL="next" HREF="node239.html"> <LINK REL="previous" HREF="node237.html"> <LINK REL="up" HREF="node235.html"> <LINK REL="next" HREF="node239.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html4376" HREF="node239.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html4373" HREF="node235.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html4367" HREF="node237.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html4375" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html4377" HREF="node239.html">Output data format</A> <B> Up:</B> <A NAME="tex2html4374" HREF="node235.html">MIDAS utilities for time</A> <B> Previous:</B> <A NAME="tex2html4368" HREF="node237.html">The TSA environment</A> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION001743000000000000000"> Input data format</A> </H2> <P> The input to all basic routines is a MIDAS table containing at least two columns with the mandatory labels <TT>:TIME</TT> and <TT>:VALUE</TT>. For analysis in the time domain a third column, <TT>:VAR</TT>, containing the variances of the column <TT>:VALUE</TT> is required. Since <TT>DOUBLE PRECISION</TT> computations are used throughout the package, all input columns must be also in <TT>DOUBLE PRECISION</TT>. In any case, it is prudent to chop off (by subtraction of a suitable constant) from the input <TT>:TIME</TT> column all leading digits which are insignificant for the present TSA purposes. Also for numerical reasons, it is recommended to use the command <TT>NORMALIZE/TSA</TT> to subtract the mean from <TT>:VALUE</TT> prior to the analysis. <P> <BR><HR> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
