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  28  <H3><A NAME="8_1_1">8.1.1 Adding plot marks to line-plots XXX</A></H3>
  29  <P> It might sometimes be desirable to highlight the data-points with
  30   marks in the intersection between the given x and Y-coordinates. This
  31   is accomplished by specifying the wanted plot mark type for the &quot;mark&quot;
  32   property of the line graph. A full list of all available marks is given
  33   in the class reference <A href="../ref/PlotMark.html#_PLOTMARK_SETTYPE">
  34  PlotMarks</A></P>
  35  <P> For now let's just add a triangle shape marker to our previous graph
  36   by adding the line<DIV class="phpscript"><CODE><FONT color="#000000"> <FONT
  37  color="#0000BB">&nbsp;$lineplot</FONT><FONT color="#007700">-&gt;</FONT><FONT color="#0000BB">
  38  mark</FONT><FONT color="#007700">-&gt;</FONT><FONT color="#0000BB">SetType</FONT><FONT
  39  color="#007700">(</FONT><FONT color="#0000BB">MARK_UTRIANGLE</FONT><FONT color="#007700">
  40  );</FONT><FONT color="#0000BB"></FONT></FONT></CODE></DIV></P>
  41  <P> This will give the graph as shown below<DIV class="example">
  42  <BR> <A href="exframes/frame_example3.1.html" target="blank"><IMG border="0"
  43  HEIGHT="200"  src="img/example3.1.png" WIDTH="300"></A>
  44  <BR><B>Figure 6:</B> Adding markers to the previous example <A href="exframes/frame_example3.1.html"
  45  target="blank">[src]</A>&nbsp;
  46  <P></P>
  47  </DIV></P>
  48  <P></P>
  49  <P> If you like you can of course both change the size, fill-color and
  50   frame color of the chosen plot mark.</P>
  51  <P> The colors of the marks will, if you don't specify them explicitly,
  52   follow the line color. Please note that if you want different colors
  53   for the marks and the line the call to SetColor() for the marks must be
  54   done after the call to the line since the marks color will always be
  55   reset to the lines color when you set the line.</P>
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