It would be a useful additon to the help page to add
integrate(dnorm, lower = -1.96, upper = 1.96, mean = 2, sd = 1)
as an example.
Thanks,
Frank
Chicago
> Date: Mon, 23 Jul 2012 19:54:45 -0700
> From: ehlers@ucalgary.ca
> To: kridox@ymail.com
> CC: chicagobrownblue@hotmail.com; r-help@r-project.org
> Subject: Re: [R] Integrate(dnorm) with different mean and standard deviation help
>
> On 2012-07-23 19:48, Pascal Oettli wrote:
> > Hello,
> >
> > Maybe the following could help:
> >
> > > f <- function(x) dnorm(x, mean=2, sd=1)
> > > integrate(f, -1.96, 1.96)
> > 0.4840091 with absolute error < 1.4e-12
>
> Or you could note the '...' argument indicated on the help page:
>
> integrate(dnorm, lower = -1.96, upper = 1.96,
> mean = 2, sd = 1)
>
> Peter Ehlers
>
> >
> > HTH
> >
> > Regards.
> >
> >
> > Le 24/07/2012 11:23, FJ M a écrit :
> >>
> >> I'm trying to provide different parameters to the integrate function for various probability functions. I'm using dnorm as the simplest example here. For instance integrate(dnorm, -1.96, 1.96) produces the correct answer for a normal distribution with mean 0 and standard deviation 1. I've tried two ways to use mean=2.0 and standard deviation 1, but with no luck. The examples follow.
> >>
> >>
> >>> integrate(dnorm, -1.96, 1.96)
> >> 0.9500042 with absolute error < 1e-11
> >>> mean = 2.0
> >>> sd = 1.0
> >>> integrate(dnorm, -1.96, 1.96)
> >> 0.9500042 with absolute error < 1e-11
> >>> integrate(dnorm(mean=2.0,sd=1.0), -1.96, 1.96)
> >> Error in .Internal(dnorm(x, mean, sd, log)) : 'x' is missing
> >> Calls: integrate -> match.fun -> dnorm
> >> Execution halted
> >>
> >> How do I change the built in mean=0 and standard deviation=1 for dnorm using integrate?
> >>
> >> Thanks,
> >>
> >> Frank
> >> Chicago, IL
> >> [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> R-help@r-project.org mailing list
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
> >>
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
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