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Re: I'm puzzled by drastic truncation of y-axis in DateListLogPlot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115424] Re: I'm puzzled by drastic truncation of y-axis in DateListLogPlot
  • From: Darren Glosemeyer <darreng at wolfram.com>
  • Date: Tue, 11 Jan 2011 00:31:39 -0500 (EST)

The fact that All does not show all the points is a bug in the log-based 
plotting code which I think will be fixed in the next release.

I get confused about the difference between All and Full as well. I'm 
told by the developer of PlotRange that PlotRange->Full uses the 
PlotRange->All result and then does some clipping. The clipping is 
similar (at least in concept and perhaps even in the internal code) to a 
applying a RegionFunction. So there is a difference between All and 
Full, but it's somewhat subtle (more subtle than I completely understand).

Darren Glosemeyer
Wolfram Research

On 1/10/2011 1:39 AM, DrMajorBob wrote:
> Criminy! If PlotRange ->  All means "all points are included", why do we
> need "PlotRange ->  Full"?
>
> What's the difference, other than "All" not meaning ALL?
>
> Bobby
>
> On Sun, 09 Jan 2011 22:45:23 -0600, Syd Geraghty<sydgeraghty at me.com>
> wrote:
>
>> Bob,
>>
>> Sorry about my mistake ... I was experimenting trying to make it work OK
>> and tried both
>>
>> 1	PlotRange->All
>>
>> 2	PlotRange->Full
>>
>> and it was PlotRange->Full that actually worked OK.
>>
>>
>>
>> Cheers .... Syd
>>
>> Syd Geraghty B.Sc, M.Sc.
>>
>> sydgeraghty at mac.com
>>
>> Mathematica 8.0 for Mac OS X x86 (64-bit) (November 6, 2010)
>> MacOS X V 10.6.5 Snow Leopard
>> MacBook Pro 2.33 GHz Intel Core 2 Duo  2GB RAM
>>
>> On Jan 9, 2011, at 7:12 PM, DrMajorBob wrote:
>>
>>> I tried PlotRange->All, and it made no difference. (Version 8.)
>>>
>>> Bobby
>>>
>>> On Sun, 09 Jan 2011 01:16:44 -0600, Syd Geraghty<sydgeraghty at me.com>
>>> wrote:
>>>
>>>> Hi James,
>>>>
>>>> Its not you ....
>>>>
>>>>
>>>> Just add PlotRange->All
>>>>
>>>> to the options of DateListLogPlot and all will be well.
>>>>
>>>> Its a bug / Feature that should be reported.
>>>>
>>>>
>>>> Cheers .... Syd
>>>>
>>>> Syd Geraghty B.Sc, M.Sc.
>>>>
>>>> sydgeraghty at mac.com
>>>>
>>>> Mathematica 8.0 for Mac OS X x86 (64-bit) (November 6, 2010)
>>>> MacOS X V 10.6.5 Snow Leopard
>>>> MacBook Pro 2.33 GHz Intel Core 2 Duo  2GB RAM
>>>>
>>>> On Jan 7, 2011, at 1:13 AM, James Stein wrote:
>>>>
>>>>> I ran into some curious behavior I can't explain. I have two rather
>>>>> benign
>>>>> lists of numbers, of equal length. When either is plotted alone, all
>>>>> goes as
>>>>> expected; and when they are plotted together, all goes *almost* as
>>>>> expected.  Dropping the last two or more values makes the plotting
>>>>> normal,
>>>>> but dropping only one, or none, the y axis extends up only to 5
>>>>> (instead of
>>>>> to 20); and the dropped values are not near the extreme values.
>>>>>
>>>>> If you copy the below into a cell and evaluate it, the gist of what
>>>>> I've
>>>>> said above will, I hope, be clear. Have I done something stupid?
>>>>>
>>>>> (* d is a list of dates; a and b are data; we combine 'd'
>>>>> with a and b to form two lists for DateListLogPlot: *)
>>>>> d={{2007,8,31},{2007,9,28},{2007,10,31},{2007,11,30},{2007,12,31},{2008,1,31},{2008,2,29},{2008,3,31},{2008,4,30},{2008,5,30},{2008,6,30},{2008,7,31},{2008,8,29},{2008,9,30},{2008,10,31},{2008,11,28},{2008,12,31},{2009,1,30},{2009,2,27},{2009,3,31},{2009,4,30},{2009,5,29},{2009,6,30},{2009,7,31},{2009,8,31},{2009,9,30},{2009,10,30},{2009,11,30},{2009,12,31},{2010,1,29},{2010,2,26},{2010,3,31},{2010,4,30},{2010,5,28},{2010,6,30},{2010,7,30},{2010,8,31},{2010,9,30},{2010,10,29},{2010,11,30},{2010,12,31},{2011,1,4}};
>>>>> a={20.78,21.3,18.5,16.11,13.58,10.04,6.74,5.88,7.63,9.32,8.83,7.84,8.04,5.07,2.41,1.94,1.48,1.64,1.82,2.04,2.4,2.88,2.46,2.05,1.74,2.1,1.48,1.81,1.97,1.67,1.79,2.13,2.35,2.52,2.12,2.34,2.23,2.6,2.5,2.38,2.6,2.64};
>>>>> b={1.43,1.45,1.48,1.50,1.52,1.55,1.57,1.59,1.62,1.64,1.67,1.696,1.712,1.75,1.77,1.80,1.83,1.86,1.88,1.91,1.94,1.97,2.00,2.03,2.1,2.10,2.13,2.16,2.20,2.23,2.26,2.30,2.33,2.36,2.40,2.44,2.48,2.52,2.55,2.59,2.63,2.64};
>>>>> a=Transpose[{d,a}];
>>>>> b=Transpose[{d,b}];
>>>>> c={a,b};
>>>>>
>>>>> (* a and b can be plotted alone; but when plotted together
>>>>> we get drastic truncation at the top of the log axis: *)
>>>>> DateListLogPlot[a,Joined->True,PlotLabel->"a alone"]
>>>>> DateListLogPlot[b,Joined->True,PlotLabel->"b alone"]
>>>>> DateListLogPlot[c,Joined->True,PlotLabel->"a and b"]
>>>>>
>>>>> (* the drastic truncation occurs suddenly; if at least two rightmost
>>>>> values
>>>>> are truncated, all is OK: *)
>>>>> x=Length[d];
>>>>> Table[DateListLogPlot[{Take[a,n],Take[b,n]},Joined->True,PlotLabel->ToString[n],ImageSize->Small],{n,x-3,x}]
>>>>>
>>>>
>>>
>>> --
>>> DrMajorBob at yahoo.com
>



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