Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.soft-sys.math.mathematica > #2448

Re: Histogram omits data points & BUG REPORT

Show all headers | View raw

Hi Barrie,

Take your Manipulate one stage further by introducing a "width" multiple:

Manipulate[
 Histogram[{-3, -1, -1, -1, 1, 1, 1, 3}, {width w}, 
  PlotRange -> {{-5, 5}, {0, 4}}],
 {w, 0.02, 0.08, 0.01},
 {width, 4, 16, 4}]

and play with "width"s even & odd and a few PlotRange variations and you will see that there is definitely a bug in Histogram.

I have also addressed this to Technical Support at WRI.

Cheers .... Syd

Syd Geraghty B.Sc, M.Sc.

sydgeraghty@mac.com

Mathematica 8.0 for Mac OS X x86 (64-bit) (February 23, 2011)
ReleaseID:    8.0.1.0 (2063982, 2063639)
MacOS X V 10.6.7 Snow Leopard 
MacBook Pro 2.33 GHz Intel Core 2 Duo  2GB RAM

On May 16, 2011, at 12:33 AM, Barrie Stokes wrote:

> Hi Yen Lee
> 
> Intrigued, I wrote the following Manipulate
> 
> Manipulate[ 
>    Histogram[{-3, -1, -1, -1, 1, 1, 1, 3}, {w}, 
>  PlotRange -> {All, All}], {w, 0.01, 0.5, 0.01} ]
> 
> Stepping w from 0.01 in the 0.01 increments shows that *only for 0.05* does this problem occur with your data. Hmmm.
> 
> Cheers
> 
> Barrie
> 
>>>> On 13/05/2011 at 8:25 pm, in message <201105131025.GAA27948@smc.vnet.net>, Yen
> Lee Loh <yenleeloh1@gmail.com> wrote:
>> Dear all,
>> 
>> With Mathematica version "8.0 for Linux x86 (64-bit) (February 23, 2011)",
>> the following command gives only three bars at horizontal positions -3, -1,
>> and 1; the bar at 3 is missing:
>> 
>>    Histogram[{-3, -1, -1, -1, 1, 1, 1, 3}, {0.05}, PlotRange -> All]
>> 
>> The following still gives the same problem.
>> 
>>    Histogram[{-3, -1, -1, -1, 1, 1, 1, 3}, {0.05}, PlotRange -> {{-4, 4},
>> All}]
>> 
>> However, the following command, with a larger bin spacing, is ok:
>> 
>>    Histogram[{-3, -1, -1, -1, 1, 1, 1, 3}, {0.1}, PlotRange -> All]
>> 
>> Just a warning for unwary users.  -Yen Lee
> 
> 

Back to comp.soft-sys.math.mathematica | Previous | Next | Find similar | Unroll thread

Thread

Re: Histogram omits data points & BUG REPORT Syd Geraghty <sydgeraghty@me.com> - 2011-05-18 11:16 +0000

csiph-web