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tabulate an expression in arbitrary precision
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Leslaw Bieniasz
Nov 29, 2008, 4:32:55 AM11/29/08
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Hi,
I am new to MATHEMATICA, and I am looking for advice.
I have access to MATHEMATICA 6.0.
I need to tabulate values of a certain expression involving error function Erf[x], for a number of x values.
The problem is that I need to do these calculations in
arbitrary precision (that is I want to be able to control
the number N of significant digits). Can anybody show me some examples of how this might be done? I stress I know
nothing about MATHEMATICA. I want the results to be displayed and saved in the form of a table having two columns, where the first column contains x values, and
the second column contains the corresponding values of the expression, with all N significant digits.
I am new to MATHEMATICA, and I am looking for advice.
I have access to MATHEMATICA 6.0.
I need to tabulate values of a certain expression involving error function Erf[x], for a number of x values.
The problem is that I need to do these calculations in
arbitrary precision (that is I want to be able to control
the number N of significant digits). Can anybody show me some examples of how this might be done? I stress I know
nothing about MATHEMATICA. I want the results to be displayed and saved in the form of a table having two columns, where the first column contains x values, and
the second column contains the corresponding values of the expression, with all N significant digits.
Leslaw
Bob Hanlon
Nov 30, 2008, 6:58:19 AM11/30/08
to
If machine precision is good enough:
Grid[Prepend[Table[{
NumberForm[x, {2, 1}],
NumberForm[Erf[x], {11, 10}, DigitBlock -> 5]},
{x, 0, 1, 0.1}],
TraditionalForm /@ {x, Erf[x]}],
Frame -> All]
For greater precision:
n = 25;
Grid[Prepend[Table[{
NumberForm[N[x], {2, 1}],
NumberForm[N[Erf[x], 2 n], {n + 1, n}, DigitBlock -> 5]},
{x, 0, 1, 1/10}],
TraditionalForm /@ {x, Erf[x]}],
Frame -> All]
Bob Hanlon
---- Leslaw Bieniasz <nbbi...@cyf-kr.edu.pl> wrote:
=============
Leslaw
--
Bob Hanlon
Raffy
Dec 1, 2008, 7:00:27 AM12/1/08
to
On Nov 29, 4:32 am, Leslaw Bieniasz <nbbie...@cyf-kr.edu.pl> wrote:
> Hi,
> I am new to MATHEMATICA, and I am looking for advice.
> I have access to MATHEMATICA 6.0.
> I need to tabulate values of a certain expression involving error functio=> Hi,
> I am new to MATHEMATICA, and I am looking for advice.
> I have access to MATHEMATICA 6.0.
n Erf[x], for a number of x values.
> The problem is that I need to do these calculations in
> arbitrary precision (that is I want to be able to control
how this might be done? I stress I know
n the form of a table having two columns, where the first column contains x=
values, and
> the second column contains the corresponding values of the expression, wi=
th all N significant digits.
>
> Leslaw
Table[{N[x], N[Erf[x], 32]}, {x, -3, 3, 1/5}] // TableForm
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