Re: tabulate an expression in arbitrary precision
- To: mathgroup at smc.vnet.net
- Subject: [mg93983] Re: tabulate an expression in arbitrary precision
- From: "m.g." <mg at michaelgamer.de>
- Date: Sun, 30 Nov 2008 07:01:23 -0500 (EST)
- References: <ggr287$e8j$1@smc.vnet.net>
On 29 Nov., 10:32, Leslaw Bieniasz <nbbie... at 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 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 Hi Leslaw, maybe I understood you wrong. But you can controll the number of significant digits simply in the following way: N[expr,num] yield "num" digits for expression "expr" (eg. N[Pi,50]) so you can probably wrap this N[xxxx] around your expression. Greetings Mike