<!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>A few useful commands</TITLE> <META NAME="description" CONTENT="A few useful commands"> <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="node463.html"> <LINK REL="previous" HREF="node461.html"> <LINK REL="up" HREF="node455.html"> <LINK REL="next" HREF="node463.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html7218" HREF="node463.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html7215" HREF="node455.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html7209" HREF="node461.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html7217" 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="tex2html7219" HREF="node463.html">Preprocessing</A> <B> Up:</B> <A NAME="tex2html7216" HREF="node455.html">Echelle Reduction</A> <B> Previous:</B> <A NAME="tex2html7210" HREF="node461.html">On-line help</A> <BR> <BR> <!--End of Navigation Panel--> <H1><A NAME="SECTION002770000000000000000"> A few useful commands</A> </H1> <P> It will be useful to have a list of the images stored on the disk. The command: <P> <BLOCKQUOTE> <TT>CREATE/ICAT mycat *.bdf</TT></BLOCKQUOTE> <P> creates a catalog stored on the disk as the file mycat.cat which contains the list of all images present on the disk. It is better to enable this catalog for automatic use by all other commands using: <P> <BLOCKQUOTE> <TT>SET/ICAT mycat</TT></BLOCKQUOTE> <P> which allows in any command to refer to a catalog image by the simplified syntax #n where n is the entry number of the image in the catalog. <P> The following commands are also useful: <P> <BLOCKQUOTE> <TT>READ/ICAT mycat</TT></BLOCKQUOTE> <P> lists the contents of an image catalog. <P> <BLOCKQUOTE> <TT>PRINT/ICAT mycat</TT></BLOCKQUOTE> <P> prints the contents of an image catalog on the default printer. See command ASSIGN/PRINT to change the default. <P> <BLOCKQUOTE> <TT>COMPUTE/IMAGE out = expression</TT></BLOCKQUOTE> <P> performs arithmetic on images, for example: <P> <BLOCKQUOTE> <TT>COMPUTE/IMAGE out = img1 - img2</TT></BLOCKQUOTE> <P> computes the difference of images img1.bdf and img2.bdf and stores the result in out.bdf. <P> <BLOCKQUOTE> <TT>STATIST/IMA frame </TT></BLOCKQUOTE> <P> performs statistic on an image. It is possible to select a sub-window in interactive mode or direct mode. <P> <BLOCKQUOTE> <TT>STATIST/IMA frame CURSOR <BR> STATIST/IMA frame area_spec</TT></BLOCKQUOTE> <P> The following commands are related to graphic facilities: <P> <BLOCKQUOTE> <TT>PLOT/IMAGE, OVERPLOT/IMAGE <BR> PLOT/TABLE, OVERPLOT/TABLE <BR> GET/GCURSOR <BR> SEND/PLOT, ASSIGN/PLOT</TT></BLOCKQUOTE> <P> It is also useful to handle tables, using commands: <P> <BLOCKQUOTE> <TT>READ/TABLE table [column] <BR> SELECT/TABLE table conditional_expression <BR> STATIST/TABLE table column <BR> COMPUTE/TABLE table out_column = expression</TT></BLOCKQUOTE> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html7218" HREF="node463.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html7215" HREF="node455.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html7209" HREF="node461.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html7217" 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="tex2html7219" HREF="node463.html">Preprocessing</A> <B> Up:</B> <A NAME="tex2html7216" HREF="node455.html">Echelle Reduction</A> <B> Previous:</B> <A NAME="tex2html7210" HREF="node461.html">On-line help</A> <!--End of Navigation Panel--> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
