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Topic: Re: mathematica fit data to inverse gamma distribution
Replies: 1   Last Post: Mar 19, 2011 5:35 AM

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 Alex Posts: 46 Registered: 1/10/07
Re: mathematica fit data to inverse gamma distribution
Posted: Mar 19, 2011 5:35 AM

On Mar 17, 12:38 pm, Alexei Boulbitch <alexei.boulbi...@iee.lu> wrote:
> Hi, Alex,
>
> put "ProbabilityDensity" instead of "PDF". In other words, try this:
>
> data1 = RandomVariate[InverseGammaDistribution[0.5, 3], 10^4];
> Show[Histogram[data1, {0, 20, 1}, "ProbabilityDensity"],
> Plot[PDF[TruncatedDistribution[{0, 20},
> InverseGammaDistribution[0.5, 3]], x], {x, 0, 20},
> PlotStyle -> Thick]]
>
> Have fun, Alexei
>
> Hi,
>
> I am trying to obtain same figure that is provided in Mathematica's websi=

te related to fitting an inverse gamma to a dataset. Here is the code I ent=
er:
>
> data1 = RandomVariate[InverseGammaDistribution[0.5, 3], 10^4];
> Show[
> Histogram[data1, {0, 20, 1}, "PDF"],
> Plot[PDF[
> x], {x, 0, 20}, PlotStyle -> Thick]]
>
> and here is the error I receive:
>
> Histogram::hspec: The height specification PDF is not one of the named he=

ight functions or a function that can be used to compute the heights for ea=
ch bin.>>
> Show::"gcomb" : StyleBox[Could not combine the graphics objects in ...=
..
>
> I would appreciate anyone's help.
>
> Regards
>
> Alex
>
> --
> Alexei Boulbitch, Dr. habil.
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> Material Development
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Hi and thanks for all your replies. It seems that I cannot get it
working in version 7.0.0. I copy and paste exactly the same thing and
I have already tried the alternatives suggested by all of you.
Nonetheless, if you have some time please let me know thoughts.

Best Wishes,

Alex.

Date Subject Author
3/17/11 Alexei Boulbitch
3/19/11 Alex