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MathGroup Archive 2007

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Re: Plot, Epilog, and Text

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80825] Re: Plot, Epilog, and Text
  • From: oshaughn <oshaughn at northwestern.edu>
  • Date: Mon, 3 Sep 2007 06:14:07 -0400 (EDT)
  • References: <fbdmo6$pat$1@smc.twtelecom.net>

> g[X_String,w_Real,f_]:=Text[Style[X,12,Bold],{w,f/.{x->w}},{0,-2}];

Among other things, you'll need to replace _Real with _?NumberQ.  3
does not have a head of Real.
Also, because Plot has Attributes[Plot] = {HoldAll,...}, you'll need
to wrap Epilog->{g...} in Evaluate to make sure g gets replaced by the
correct value.

At this point, if you put //Trace after each version of the Plot
command, you can see that both end up evaluating the same thing. And
both do produce the correct plot.

Hope this helps.

-Richard



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