Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2010

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: A Question About Directive

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111298] Re: A Question About Directive
  • From: Brett Champion <brettc at wolfram.com>
  • Date: Tue, 27 Jul 2010 04:14:54 -0400 (EDT)

On Jul 26, 2010, at 5:38 AM, Kevin J. McCann wrote:

> However, is Directive[Red,AbsoluteThickness[2]] really more readable
> than {{Red,AbsoluteThickness[2]}}? I don't think so. Again, this seems
> like very little, even if you prefer the former, for a new function  
> to do.
>

It may not make a big difference for PlotStyle, but within some of the  
newer options it does.  For example, ChartStyle can use one more level  
of grouping than PlotStyle, so you could have things like  
{{{Red,Thick},...}}.  In MeshShading you can get arbitrarily deep,  
depending on the number of mesh functions you have.

As a developer, it is *very* convenient to not have distinguish List- 
as-a-set and List-as-a-combination in the code.  It means that I can  
make decisions on a more local scale without needing to keep  
information about what level I'm at.

As for ambiguity, consider that *for ages* the documented and  
implemented behaviors of PlotStyle did not agree, at least for some  
functions.

According to the old documentation [http://reference.wolfram.com/legacy/v4/RefGuide/PlotStyle.html 
]

Plot[{x, -x}, {x, 0, 10}, PlotStyle -> {Thickness[0.02],Hue[1]}]

should have behaved as

Plot[{x, -x}, {x, 0, 10}, PlotStyle -> {{Thickness[0.02],Hue[1]}}]

instead of as

Plot[{x, -x}, {x, 0, 10}, PlotStyle -> {{Thickness[0.02]},{Hue[1]}}]


Brett

> Kevin
>
> AES wrote:
>> In article <i2eadd$q1l$1 at smc.vnet.net>,
>> Murray Eisenberg <murray at math.umass.edu> wrote:
>>
>>> Fewer keystrokes is not the sole metric for simplicity! Code  
>>> readability
>>> is another.
>>
>> Agreed!
>>
>> Wasn't APL the classic example of a language with near-minimum
>> keystrokes, near-maximum unreadability?  -- such that APL programs  
>> were
>> sometimes characterized as "write once, read never".
>>
>



  • Prev by Date: Re: FindRoot + Compile = incompatible (?)
  • Next by Date: Re: Linking my fortran subroutines with Mathematica
  • Previous by thread: Re: A Question About Directive
  • Next by thread: Kolmogorov-Smirnov 2-sample test