[Gnuplot-info] do you know how to draw a line, or a circle from c/c++ program? as well as from gnuplot

[Eric L. <fs...@ya...>]

dear gnuplot experts:
   
    do you know how to draw  a line or a circle from c/c++ program?
  as well as from gnuplot(like to know how to do it too)
  or
  octave(like to know how to do it too)?
   
    looking to see your help, and thanks in advance, eric

 
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