File: ebars.jgr

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jgraph 83-19
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(* This graph shows the use of y_epts to get error bars onto the graph.
   It plots the curve y = 2x plus or minus x/2 for integer x values
   from from 1 to 10 *)

newgraph
xaxis min 0 max 10 label : x
yaxis min 0 max 25 label : y = 2x +- x/2

newcurve marktype circle linetype dotted
  (* These points could equally be generated by: 
     y_epts shell : echo "" |\
      awk '{ for (i = 1; i < 11; i++) print i, 2*i, 2*i-i/2.0, 2*i+i/2.0}'
   *)
  y_epts
   1 2 1.5 2.5
   2 4 3 5
   3 6 4.5 7.5
   4 8 6 10
   5 10 7.5 12.5
   6 12 9 15
   7 14 10.5 17.5
   8 16 12 20
   9 18 13.5 22.5
   10 20 15 25