File:BenfordBroad.png

Summary

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Licensing

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

(* Source code written in Mathematica 6.0, by Steve Byrnes, 2008. I release this code into the public domain. *)

LabelsList = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 70, 100, 200, 300, 500, 1000, 2000, 5000, 10000};
LineList = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600,
   700, 800, 900, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000};

ff[x_] := 
  x Exp[-.1 x] .1 + x Exp[-.03 x] .03 +  x Exp[-.01 x] .01 + 
   x Exp[-.003 x] .003 + x Exp[-.001 x] .001 + x Exp[-.0003 x] .0003;

firstdig1[xx_] :=
  (1 < xx && xx < 2) || (10 < xx && xx < 20) || (100 < xx && xx < 200) || (1000 < xx && xx < 2000);
firstdig8[xx_] :=
  (8 < xx && xx < 9) || (80 < xx && xx < 90) || (800 < xx && xx < 900) || (8000 < xx && xx < 9000);

plotA = LogLinearPlot[{ff[x], If[firstdig1[x], ff[x], 0], If[firstdig8[x], ff[x], 0]}, {x, .99, 10100}, 
  Ticks -> {LabelsList, {}}, PlotRange -> {0, 1}, TicksStyle -> Directive[Black, 10],
  GridLines -> {LineList, {}}, ImageSize -> 401, AspectRatio -> .3,
  Filling -> {2 -> Bottom, 3 -> Bottom}, PlotPoints -> 1000, PlotStyle -> {Black, Red, Blue}, 
  FillingStyle -> {2 -> Red, 3 -> Blue}]

Export["plotA.gif", plotA, ImageSize -> 500]

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