Re: Getting histogram information

• To: mathgroup at smc.vnet.net
• Subject: [mg100737] Re: [mg100692] Getting histogram information
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Thu, 11 Jun 2009 21:46:25 -0400 (EDT)

```data = RandomReal[
NormalDistribution[0, 5*RandomReal[]],
{RandomInteger[{100, 500}]}];

h = Histogram[data]

Binwidth

bw = Cases[h, RectangleBox[c1_, c2_] -> c2 - c1,
Infinity][[1, 1]]

Bob Hanlon

---- Raul Martinez <raulmart at mac.com> wrote:

=============
All,

I have used the Histogram[] function many times. It works well and has
lots of options but seems to lack transparency.

Specifically, if I don't specify a bin width and let the function
compute it, I want to know exactly what bin width the function used.
Obviously, with some additional work I can infer the bin width from
the resulting histogram. It would be better, however, to know
precisely the bin width that the function actually used.

providing me with a bit of clever but rather obscure code that returns
the populated histogram bins. But this still requires additional work
to infer the bin width. The code provided by Wolfram support is listed
after the signature.

Can anyone figure out how to get the bin width directly from the
Histogram[] function?

Raul Martinez

Code:

data1=RandomReal[NormalDistribution[0,1],100];

h
=
Reap
@Histogram[data1,Automatic,Function[{xbins,counts},Sow[counts];counts]]

h[[2]]

h[[2,1,1]]

(*This will give the number of bins.*)
h[[2,1,1]]//Length

```

• Prev by Date: Re: Getting histogram information
• Next by Date: Re: AnimationDirection when Exporting
• Previous by thread: Re: Getting histogram information
• Next by thread: Re: Getting histogram information