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Re: Plot, Epilog, and Text
*To*: mathgroup at smc.vnet.net
*Subject*: [mg80818] Re: Plot, Epilog, and Text
*From*: Bill Rowe <readnewsciv at sbcglobal.net>
*Date*: Mon, 3 Sep 2007 06:10:32 -0400 (EDT)
On 9/2/07 at 2:52 AM, vze269bv at verizon.net (Bruce Colletti) wrote:
>Re 6.0.1 under WinXP.
>Why does the first Plot fail but not the second?
>They seem equivalent: the former simply uses a function to
>implement the Text command that is explicit in the second Plot.
>f=PDF[NormalDistribution[3,Sqrt[6]],x];
>g[X_String,w_Real,f_]:=Text[Style[X,12,Bold],{w,f/.{x->w}},{0,-2}];
>
>Clear@x;
>Plot[f,{x,-40,40},PlotRange->All,Epilog->{g["X",3,f]}]
>Plot[f,{x,-40,40},PlotRange->All,Epilog->{Text[Style["X",12,Bold],{3
>,f/.{x->3}}]}]
There are two issues that make things different.
First, the second argument to your function g is specified to be
a Real but when you use it you supply an Integer. That causes g
to be unevaluated which produces an error.
Second, your function g supplies a third argument to Text, i.e.,
{0,-2} which is an offset outside the range of the bounding rectangle.
Changing the definition of g to be
g[X_String,w_,f_]:=Text[Style[X,12,Bold],{w,f/.{x->w}}]
Will cause both Plot commands to produce the same graphic
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