[R] Extending the accuracy of exp(1) in R

David Winsemius dwinsemius at comcast.net
Tue Nov 9 14:33:41 CET 2010

On Nov 9, 2010, at 8:21 AM, Shant Ch wrote:

> Hi,
> I want to use a more accurate value of exp(1).  The value given by R  
> is
> 2.718282.

Well, not really. That is what is printed at the console with the  
default settings for digits. The internal representation is wider:

 > format(exp(1), digits=15)
[1] "2.71828182845905"

> I want a value which has more than 15 decimal places. Can anyone let
> me know how can I increase the accuracy level.

You already have it.
> Actually there are some large multipliers of exp(1) in my whole  
> expression, and
> I want a more accurate result at the last step of my program, and  
> for that I
> need to use highly accurate value of exp(1).
> Can anyone help me out? Thanks.
> Shant

David Winsemius, MD
West Hartford, CT

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