Summary/title> <meta NAME="description" CONTENT="Summary"> <meta NAME="keywords" CONTENT="grph2"> <meta NAME="resource-type" CONTENT="document"> <meta NAME="distribution" CONTENT="global"> <meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=EUC-JP"> <link REL="next" HREF="node129.html"> <link REL="previous" HREF="node127.html"> <link REL="up" HREF="node127.html"> <link REL="next" HREF="node129.html">  <SCRIPT LANGUAGE="JavaScript">  </SCRIPT>  </HEAD> <body topmargin="0" leftmargin="0"><p class="NavigateTable" align="right"><a href="node127.html">Back</a>|<a href="node129.html">Forward</a></p> <p class="NavigateText"><a href="../index.html">DCL</a>:<a href="index.htm">GRPH2</a>:<a href="node127.html">UDPACK: Contour Routines</a></p> <h1>8.1 Summary</h1> <p> The UDPACK is a subroutine package for drawing 2-D contour graphs. The contour lines are drawn in the UC, and are compatible with all normalization transformations. <p> <br> <br> The labeled contour lines in this package are drawn by subroutines that draw line segments with the internal variable <tt>'LCHAR'</tt> handled by <tt>SG</tt><i>p</i><tt>GET/SG</tt><i>p</i><tt>SET</tt> of GRPH1 set as <tt>.TRUE.</tt>. This package only draws the contour lines, and does not draw the outer frames such as the coordinate axes. <p> <br> <br> The following are the subroutines for the user in the UDPACK. <ul> <li>Draw routines <dl> <table border="0" cellpadding="3"> <tr> <td valign="top"><tt>UDCNTR</tt> </td> <td valign="top">. . . </td> <td> Draws a 2-D contour graph (using a work area provided internally).</td> </tr> <tr> <td valign="top"><tt>UDCNTZ</tt> </td> <td valign="top">. . . </td> <td> Draws a 2-D contour graph (using a work area given by the user).</td> </tr> </table> <dd> <dt> </dt> </dl> <li>Routines for contour level <p> <dl> <table border="0" cellpadding="3"> <tr> <td valign="top"><tt>UDGCLA</tt> </td> <td valign="top">. . . </td> <td> Generates contour by minimum & maximum values and step size.</td> </tr> <tr> <td valign="top"><tt>UDGCLB</tt> </td> <td valign="top">. . . </td> <td> Generates contour by the array giving the grip point values and step size.</td> </tr> <tr> <td valign="top"><tt>UDICLV</tt> </td> <td valign="top">. . . </td> <td> Initializes (clears) a contour level.</td> </tr> <tr> <td valign="top"><tt>UDSCLV</tt> </td> <td valign="top">. . . </td> <td> Generates a single contour level.</td> </tr> <tr> <td valign="top"><tt>UDDCLV</tt> </td> <td valign="top">. . . </td> <td> Deletes a single contour level.</td> </tr> </table> <dd> <dt> </dl> <li>Other Routines <p> <dl> <table border="0" cellpadding="3"> <tr> <td valign="top"><tt>UDSFMT</tt> </td> <td valign="top">. . . </td> <td> Specifies the format of a contour level.</td> </tr> <tr> <td valign="top"><tt>UD</tt><i>p</i><tt>GET/UD</tt><i>p</i><tt>SET</tt></td> <td valign="top">. . . </td> <td> Inquires/changes an internal variable.</td> </tr> </table> <dd> </dl></ul> <p> <br> <br> Information concerning grid-point coordinates are handled by the UWPACK (See Section <a href="node160.html">11</a>.) <ul> <li>Routines for Setting Grid-Point Coordinates <p> </p> <table border="0" cellpadding="3"> <tr> <td valign="top"><tt>UWSGXA/UWSGYA</tt> </td> <td valign="top">. . . </td> <td> Sets by giving each coordinate value.</td> </tr> <tr> <td valign="top"><tt>UWSGXB/UWSGYB</tt> </td> <td valign="top">. . . </td> <td> Sets using the minimum and maximum values.</td> </tr> </table> </ul> <p> <br> <br> If you wish to have a quick look at the contour for a 2-D data set, then simply make a call to <tt>UDCNTR </tt>(or <tt>UDCNTZ</tt>). Evenly-spaced grid points will be set to the full extent of the window, and the contour level will be generated automatically.<p> <br> <br> If the grid points are not evenly spaced, then call <tt>UWSGXA</tt> (X direction)/<tt>UWSGYA</tt> (Y direction) before the call to <tt>UDCNTR</tt>, and set the coordinate values of the grid points beforehand. When you wish to set equidistant grid points in only a certain part of the window, then use <tt>UWSGXB</tt> (X direction)/<tt>UWSGYB</tt> (Y direction) to set the minimum and maximum values for the grid points.<p> <br> <br> Or, when you wish to specify the contour level beforehand, then call <tt>UDGCLA</tt> or <tt>UDGCLB</tt> before making the call to <tt>UDCNTR</tt> (or <tt>UDCNTZ</tt>). However, in this case, only contour levels with equal intervals are generated. If you wish to generate contour levels at uneven intervals, or if you wish to add a specific contour level, generate each contour level using <tt>UDSCLV</tt>. (To clear a single contour level, call <tt>UDDCLV</tt>. To clear all contour levels, call <tt>UDICLV</tt>.)<p> <br> <br> Internally, the routines use the COMMON blocks named <tt>UDBLK1</tt>, <tt>UDBLK2</tt>, and <tt>UDBLK3</tt>. The user must not use an external procedure or a COMMON block with the same name. <br><hr>  <SCRIPT SRC="../copyright.js"></SCRIPT> <!--%end{enbed