File: GraphS17.htm

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<HTML>
<HEAD>
<TITLE>Getting the axis numbers right</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">

<P><font size="+2" color="green">Getting the axis numbers right</font></P>
<P>
 Suppose you want a <i>y</i>-axis number range from <CODE>0</CODE> to
 <CODE>0.0008</CODE> and an <i>x</i>-axis number
 range from <CODE>-40</CODE> to <CODE>30</CODE>.  You set the axis scales
 with the commands below and by default you will get the left axis box
 in the figure below.</P>
<p>
 <font color="blue"><PRE>
 SCALE -40 30 0 .0008  ! x-axis: -40 to 30,  y-axis: 0 to 0.0008
 GRAPH\AXESONLY        ! only plot the axes
 </PRE></font></p>
<p>
 <center><IMG SRC="GraphS17I01.gif"></center></p>
<P>
 But suppose you want the <i>y</i>-axis numbers to be of the form
 <CODE>n.0</CODE> with something like (&times;10<sup><i>-m</i></sup>)
 included as part of the <i>y</i>-axis label.  Then you could enter the
 commands below to produce the axis box on the right in the figure.</P>
<p>
 <font color="blue"><PRE>
 SET YPOWERAUTO 0        ! do not automatically calculate the y-axis power 
 SET YPOWER -4           ! set the y-axis power
 SET YNUMBEROFDECIMALS 1 ! number of decimal places for y-axis numbers
 SET YNUMBEROFDIGITS 3   ! number of digits for y-axis numbers
 SCALE -40 30 0 .0008    ! set the axis scales after the numbering format
 GRAPH\AXESONLY          ! just plot the axes
 </PRE></font></p>
<P>
 <a href="GraphS16.htm"><img src="../shadow_left.gif">&nbsp;
   <font size="+1" color="olive">A script to plot a curve with axes</font></a></P>
</BODY>
</HTML>