MathGroup Archive 2009

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

Search the Archive

Re: Experimental`$EqualTolerance

  • To: mathgroup at smc.vnet.net
  • Subject: [mg105396] Re: Experimental`$EqualTolerance
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Tue, 1 Dec 2009 04:13:36 -0500 (EST)
  • References: <968DB74B-05EC-42BA-9FF6-09B99B556FDE@mimuw.edu.pl>

O.K. I noticed my mistake. The functions do not exist in the 
Experimental context in Mathemaica 7.01 - what happened was that I 
created them by trying to check if they existed! That's an old trap that 
I have not fallen into for many years ;-)

So it only leaves the question: it the old functionality still available 
in some way?

Andrzej Kozlowski



On 1 Dec 2009, at 11:07, Andrzej Kozlowski wrote:

> The functions $EqualTolerance and $SameQToleranceexists in the 
Experimantel context both in Mathematica 5.2 and in later versions. But 
while in 5.2 I get
>
> In[1]:=
> Experimental`$EqualTolerance
>
> Out[1]=
> 2.10721
>
> In 7.01 I get:
>
> In[44]:= Experimental`$EqualTolerance
>
> Out[44]= Experimental`$EqualTolerance
>
> Further more, it seems that although the function name $EqualTolerance 
has been retained in the Experimental context, the function itself no 
longer does anything. Compare:
>
> Mathematica 5.2
>
> In[9]:=
> Block[{Experimental`$EqualTolerance =16}, 1. == 2.]
>
> Out[9]=
> True
>
> Mathematica 7.01
>
> In[58]:= Block[{Experimental`$EqualTolerance = 16}, 1. == 2.]
>
> Out[58]= False
>
>
> Was keeping Experimental`$EqualTolerance while removing its definition 
in Mathematica 7 just an oversight or does it still serve some purpose? 
And has the functionality been transferred to some other function?
>
> Andrzej Kozlowski



  • Prev by Date: Re: Simple Spreadsheet within Mathematica?
  • Next by Date: Re: Replacement rules that contain function arguments (evaluation
  • Previous by thread: Experimental`$EqualTolerance
  • Next by thread: Re: Re: Experimental`$EqualTolerance