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MathGroup Archive 2007

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Re: getting data for Histogram

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80458] Re: [mg80428] getting data for Histogram
  • From: Sseziwa Mukasa <mukasa at jeol.com>
  • Date: Thu, 23 Aug 2007 01:00:49 -0400 (EDT)
  • References: <200708220844.EAA08708@smc.vnet.net>

On Aug 22, 2007, at 4:44 AM, Arkadiusz.Majka at gmail.com wrote:

> Hi,
>
> 3 years ago the following problem was given
>
> "I assume that in the process of creating a Histogram plot,
> Mathematica must be calculating a list of BinCounts -- but how can  
> I get at that
> list immediately after making and displaying the histogram? "
>
> Do you know the answer?

In version 6 BinCounts is now an function.

Otherwise the result of Histogram is a Graphics object, the bins can  
be obtained from the parameters to the Rectangle expressions in that  
that object which can be obtained as follows:

<< Graphics`Graphics`
<<Statistics`NormalDistribution`
obj = Histogram[RandomArray[NormalDistribution[], 100]];
bins=Cases[obj, Rectangle[__], Infinity]/.Rectangle[{l_, b_}, {r_,  
t_}] -> {l, r}

Regards,

Ssezi


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