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[Q] Plotting non-continuous function

  • To: mathgroup at
  • Subject: [mg4413] [Q] Plotting non-continuous function
  • From: pherron at GSB-Pound.Stanford.EDU (Michael C. Herron)
  • Date: Sun, 21 Jul 1996 22:39:15 -0400
  • Organization: Graduate School Of Business, Stanford University
  • Sender: owner-wri-mathgroup at

Suppose I have defined:

f[x_] := Which [x<=5,2,True,10]

If I then do Plot [f[t],{t,0,20}], the resulting graphic has a
vertical line at x=5.  Is there anyway to avoid this?  Ideally, I
would like the plot to have an open ball on the line y=2 and a closed
ball at y=10 to indicate that the function at x=5 has a limit from the
right but not from the left.  Is it possible to do this?  If the
answer is in a mathematica book, I would like a reference.




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