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Re: Get Distribution from Interpolated Function
*To*: mathgroup at smc.vnet.net
*Subject*: [mg128293] Re: Get Distribution from Interpolated Function
*From*: Murta <rodrigomurtax at gmail.com>
*Date*: Fri, 5 Oct 2012 02:49:47 -0400 (EDT)
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*Delivered-to*: l-mathgroup@wolfram.com
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*References*: <20121003070909.A52016881@smc.vnet.net> <k4j0in$7p3$1@smc.vnet.net>
On Thursday, October 4, 2012 12:43:47 AM UTC-3, Tomas Garza wrote:
> I think the Histogram is working fine. The problem is with randonData, all of whose elements are less than 1.Note that dist is not a probability distribution, since in my example
>
> In[3]:= NIntegrate[PDF[dist, x], {x, 0, 10}]
>
>
>
> Out[3]= 13.6285
>
> If you first normalize dist (i.e., divide dist by NIntegrate[PDF[dist, x], {x, 0, 10}]), then you'll get a histogram which more or less resembles the curve form.
>
> --Tomas
>
>
>
> > From: rodrigomurtax at gmail.com
>
> > Subject: Get Distribution from Interpolated Function
>
> > To: mathgroup at smc.vnet.net
>
> > Date: Wed, 3 Oct 2012 03:09:09 -0400
>
> >
>
> > Hi All
>
> >
>
> > I'm trying to get a distribution from an interpolated function but with no success.
>
> >
>
> > (*Creating Dist from interpolation*)
>
> > ff = Interpolation[Table[{i, 1 + RandomReal[1]}, {i, 0, 10, 1}], Method -> "Spline"];
>
> > dist = ProbabilityDistribution[ff[x], {x, 0, 10}];
>
> >
>
> > (*Plot Interpolation ok!*)
>
> > Plot[ff[x], {x, 0, 10}]
>
> >
>
> > (*Plot Dist ok!*)
>
> > Plot[Evaluate@PDF[dist, x], {x, 0, 10}]
>
> >
>
> > (*do not work as spected, the histogram don't have the curve format*)
>
> > randonData = RandomVariate[dist, 100000];
>
> > Histogram[randonData, {0.1}, "Probability", PlotRange -> {{0, 10}, All}]
>
> >
>
> > tks in advance
>
> > Murta
>
> >
Bob tks.
It's just what I need
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