Re: [R] Integral of function of dnorm

Yes, this can be easily computed analytically (even though my result is a bit different). --- On Fri, 12/2/10, dav...@rhotrading.com dav...@rhotrading.com wrote: From: dav...@rhotrading.com dav...@rhotrading.com Subject: Re: [R] Integral of function of dnorm To: Greg Snow greg.s...@imail.org

Re: [R] Integral of function of dnorm

This is exactly what I mean. I need to find integrate(dnorm(mean=8,sd=1)*log(dnorm(mean=8,sd=1)), -Inf, Inf) Which doesn't work like that, because it says: Error in dnorm(mean = 8, sd = 1) : element 1 is empty; the part of the args list of '.Internal' being evaluated was: (x, mean, sd,

Re: [R] Integral of function of dnorm

[mailto:r-help-boun...@r-project.org] On Behalf Of Trafim Vanishek Sent: Thursday, February 11, 2010 11:49 AM To: Peter Dalgaard Cc: r-help@r-project.org Subject: Re: [R] Integral of function of dnorm This is exactly what I mean. I need to find integrate(dnorm(mean=8,sd=1)*log(dnorm(mean=8,sd=1

Re: [R] Integral of function of dnorm

: r-help@r-project.org Subject: Re: [R] Integral of function of dnorm This is exactly what I mean. I need to find integrate(dnorm(mean=8,sd=1)*log(dnorm(mean=8,sd=1)), -Inf, Inf) Which doesn't work like that, because it says: Error in dnorm(mean = 8, sd = 1) : element 1 is empty; the part

Re: [R] Integral of function of dnorm

Healthcare greg.s...@imail.org 801.408.8111 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- project.org] On Behalf Of Trafim Vanishek Sent: Thursday, February 11, 2010 9:49 AM To: Peter Dalgaard Cc: r-help@r-project.org Subject: Re: [R] Integral

Re: [R] Integral of function of dnorm

-project.org Subject: Re: [R] Integral of function of dnorm Try: tmpfun - function(x) dnorm(x,mean=8,sd=1)*log(dnorm(x,mean=8,sd=1)) integrate( tmpfun, -Inf, Inf) Also you may want to look at the log argument to dnorm rather than taking the log of the function. Hope this helps, -- Gregory (Greg) L

[R] Integral of function of dnorm

Dear all, How is it possible in R to calculate the following integral: Integral(-Inf, Inf)[log(dnorm(mean = 3, sd = 1))] how can I define that the density dnorm is taken on (-Inf, Inf) Thanks a lot! [[alternative HTML version deleted]] __

Re: [R] Integral of function of dnorm

Trafim Vanishek wrote: Dear all, How is it possible in R to calculate the following integral: Integral(-Inf, Inf)[log(dnorm(mean = 3, sd = 1))] how can I define that the density dnorm is taken on (-Inf, Inf) Thanks a lot! Er, if you mean integral with respect to the x argument in dnorm,