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      <title>Case Control X-Y PLOT Commands</title>
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      <div class="title_topic1" id="xps10_pagetitle">Case Control X-Y PLOT Commands </div>
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      <p class="para_topic">The X-Y output request packet of the Case Control Section includes all commands between either OUTPUT(XYPLOT) or OUTPUT(XYOUT) and either BEGIN BULK or OUTPUT(PLOT).  The remainder of this section describes the X-Y output commands. </p>
      <p class="para_topic">A single set of plotted X-Y pairs is known as a curve.  Curves are the entities that the user requests to be plotted.  The surface (paper, microfilm frame, etc.) on which one or more curves is plotted is known as a frame.  Curves may be plotted on a whole frame, an upper-half frame, or a lower-half frame.  Grid lines, tic marks, axes, axis labeling and other graphic control options may be chosen by the user.  The program will select defaults for parameters not selected by the user. </p>
      <p class="para_topic">Only two commands are required for an X-Y output request. </p>
      <ol type="1" start="1">
         <li>
            <p class="para_item">Only one of OUTPUT(XYPLOT) or OUTPUT(XYOUT) at the beginning of the X-Y output command packet. </p>
         </li>
         <li>
            <p class="para_item">At least one of the commands XYPLOT, XYPEAK, XYPRINT, XYPUNCH, or XYPAPLOT. </p>
         </li>
      </ol>
      <p class="para_topic">The commands OUTPUT(XYPLOT) and OUTPUT(XYOUT) are equivalent. If the X-Y output is to be printed and/or punched, a PLOTTER command is not required. </p>
      <p class="para_topic">If only the required commands are used, the graphic control options will all assume default values.  Curves using all default parameters have the following general characteristics: </p>
      <ol type="1" start="1">
         <li>
            <p class="para_item">Tic marks are drawn on all edges of the frame.  Five spaces are provided on each edge of the frame. </p>
         </li>
         <li>
            <p class="para_item">All tic marks are labeled with their values. </p>
         </li>
         <li>
            <p class="para_item">Linear scales are used. </p>
         </li>
         <li>
            <p class="para_item">Scales are selected such that all points fall within the frame. </p>
         </li>
         <li>
            <p class="para_item">The plotter points are connected with straight lines. </p>
         </li>
         <li>
            <p class="para_item">The plotted points are not identified with symbols. </p>
         </li>
      </ol>
      <p class="para_topic">The above characteristics may be modified by inserting any of the parameter definition commands in the next section, ahead of the XY____ command(s). The use of a parameter definition command sets the value of that parameter for all following command operation commands unless the CLEAR command is inserted.  If grid lines are requested, they will be drawn at the locations of all tic marks that result from defaults or user requests.  The locations of tic marks (or grid lines) for logarithmic scales cannot be selected by the user.  Values for logarithmic spacing are selected by the program.  The values for the number of tic marks (or grid lines) per cycle depend on the number of logarithmic cycles required for the range of the plotted values. </p>
      <p class="para_topic">The definition and rules for the X-Y output commands follow.  The form of X-Y output commands differs in many instances from that of similar commands used in the OUTPUT(PLOT) section. </p><a class="endOfDocLinks" href="07ref78402_2.html">X-Y Output Command Summary</a><br></body>
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