Re: Precision issues
- To: mathgroup at smc.vnet.net
- Subject: [mg73510] Re: Precision issues
- From: Scott Hemphill <hemphill at hemphills.net>
- Date: Wed, 21 Feb 2007 01:35:54 -0500 (EST)
- References: <erelv2$7ol$1@smc.vnet.net>
- Reply-to: hemphill at alumni.caltech.edu
mickey <micky at hotmail.com> writes:
> Hi,
>
> I am calculating certain integrals numerically and get back a number.
> Now, is it possible to determine how many digits is that answer accurate
> to?
>
> E.g.,
>
> NIntegrate[ Exp[-p^2 - q^2], {p, 0, 10}, {q, 0, 10}, Method ->
> MonteCarlo[24], MaxPoints -> 1000000]
>
> Gives,
>
> 0.791249
>
> How many digits is this answer accurate to?
About two. Hint: your integral can be separated into the product of two
integrals, one in "p" and the other in "q".
Scott
--
Scott Hemphill hemphill at alumni.caltech.edu
"This isn't flying. This is falling, with style." -- Buzz Lightyear