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Help with Manipulate

  • To: mathgroup at
  • Subject: [mg131853] Help with Manipulate
  • From: "Eduardo M. A. M. Mendes" <emammendes at>
  • Date: Fri, 18 Oct 2013 04:44:48 -0400 (EDT)
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Although I have been using Mathematica for a while I still consider myself a rookie.   Could someone explain what I am doing wrong with the following code, please?

sum=RandomVariate[FRatioDistribution[2,2 \[CurlyPhi]],np];
Do[sum=sum+RandomVariate[FRatioDistribution[2,2 =
Histogram[sum,{Min[sum],Max[sum],1},"PDF",AspectRatio->1/3,PlotRange-> {{Min[sum],Max[sum]},All},ImageSize->Large],
{{\[CurlyPhi],5,"parameter"},1,1000, Appearance->"Labeled"},
{{np,1000,"number of data points"},1,1000000, Appearance->"Labeled"},{{nr,20,"number of replications"},5,10000, Appearance->"Labeled"}];

Nothing shows up.

Is there a faster way to implement the summation?

Many many thanks


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