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Re: Higher precision in Error function Erf[] needed.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg127176] Re: Higher precision in Error function Erf[] needed.
  • From: Ray Koopman <koopman at sfu.ca>
  • Date: Wed, 4 Jul 2012 03:31:53 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jsbt4i$6pq$1@smc.vnet.net> <jseeua$i3d$1@smc.vnet.net>

On Jul 2, 2:28 am, "Nasser M. Abbasi" <n... at 12000.org> wrote:
> On 6/30/2012 4:17 AM, Ray Koopman wrote:
>
>> Just alter the precision of its input. First define
>>
>>    f[x_,n_] := 8*(10 - Abs[10 - 20000*SetPrecision[x,n]])
>>
>> Then
>>
>>    Plot[Exp@#*(1-Erf@Sqrt@#)&@f[x,20], {x,0,10^-3}, Compiled->False]
>>
>> works fine.
>
> fyi;
>
> using Mathematica 8, the 'Compiled->False' is shown in RED
> letters, meaning is not valid option for Plot.

So the advice at
<http://reference.wolfram.com/mathematica/ref/Compiled.html>
to use Compiled->False when plotting is "no longer operative"?



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