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MathGroup Archive 2007

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Re: Plot a simple function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74875] Re: [mg74845] Plot a simple function
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Mon, 9 Apr 2007 06:16:25 -0400 (EDT)
  • Reply-to: hanlonr at cox.net

H[p_] := -p*Log[2, p] -(1-p)*Log[2, 1-p] /; 0 <= p <= 1;

Plot[H[p],{p,0,1},
    PlotStyle->{AbsoluteThickness[3],Blue},
    Frame->True,
    FrameTicks->{Range[0,1,0.5],Range[0,1,0.5],None,None},
    FrameStyle->White,
    FrameLabel->{"Pr(X = 1)","H(X)"},
    AspectRatio->1,
    TextStyle->{FontSize->18},
    GridLines->Table[Table[
          {x,{AbsoluteThickness[2],GrayLevel[0.9]}},
          {x,0,1,0.1}],{2}],
    Prolog->{Black,
        AbsoluteThickness[2],
        Line[{{0,1.05},{0,0},{1.05,0} }]}];


Bob Hanlon

---- "Paul K." <jorgecordero at gmail.com> wrote: 
> Hi, a simple query. Do you know how could I plot the entropy function
> in Mathematica? I wish to produce an image similar to this one:
> 
> http://upload.wikimedia.org/wikipedia/commons/c/c9/Binary_entropy_plot.png
> 
> Do you know how could I plot mutual information between two random
> variables X and Y in a 3D surface in Mathematica?
> 
> Thanks!
> 
> Paul.
> 
> 



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