[OGRUG] R-UG-Ottawa Digest, Vol 40, Issue 1

[Daniel Buijs]

Alex:

I work with R here at Health Canada. Still building expertise, but here's
some initial stuff:

http://github.com/dbuijs/HealthCanadaOpenData/

Would love to hear what you're up to.

Dan Buijs

On Aug 9, 2016 6:01 AM, <r-ug-ottawa-request at r-project.org> wrote:

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> Today's Topics:
>
>    1. Centres of ExpeRtise within GOC? (Alex Demarsh)
>    2. Likelihood Ratio Test (Felipe)
>    3. Re: Centres of ExpeRtise within GOC? (clark richards)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 08 Aug 2016 18:05:48 +0000
> From: Alex Demarsh <alexdemarsh at gmail.com>
> To: r-ug-ottawa at r-project.org
> Subject: [OGRUG] Centres of ExpeRtise within GOC?
> Message-ID:
>         <CAPJGrdfZ97DbUH8vXuUoO8Eb6UW=g_UpFuy=qir85Xw3qiCpOg at mail.
> gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Hey folks -
>
> Not sure if this is on-topic for this list, but I've become curious about
> the prevalence of R use in the Government of Canada (GOC) - particularly
> how many analytic teams are using R as their primary language.
>
> So, if you're a member of (or just know of) such an "R Shop", could you let
> me know? Any information on specific tasks or level of expertise would be a
> helpful addition.
>
> Many thanks in advance,
>
> Alex Demarsh
> Epidemiologist/Biostatistician, Public Health Agency of Canada
>
>         [[alternative HTML version deleted]]
>
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 8 Aug 2016 22:15:31 -0300
> From: Felipe <felipe.e.barletta at gmail.com>
> To: r-ug-ottawa at r-project.org
> Subject: [OGRUG] Likelihood Ratio Test
> Message-ID: <57A92EB3.90506 at gmail.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Hi dear R users!
>
> I have a dubt about how to calculate the Likelihood Ratio Test:
>
> I have below a density function:
>
>
> ##### Density Gompertz
> dG <- function(x,a,b, log=FALSE){
> d2 <- numeric(length(x))
> d2 <- b*exp(a*x)*exp(-b/a*(exp(a*x) - 1))
> dens <- if(log) log(d2) else d2
> return (dens)
> }
>
> #### log-likelihood
> ldG <- function(par, x)
> {
> sum( dG(x, a = par[1], b = par[2], log = TRUE))
> }
>
> emv.dG <- optim(par = c(.15, .01), fn = ldG, x = d1, hessian=TRUE
> ,control=list("fnscale"=-1))
>
> emv.dG$value # likelihood
>
> How do I calculate the Likelihood Ratio Test without a some package.
> LRT = -2*(emv.dG$value - ?????)
>
> --
> Atenciosamente
> Felipe E. Barletta Mendes
> Estat?stico(UFPR) - Conre3 9766-A
> Mestrando em Bioestat?stica(UEM)
> +55 (41)-92077191
> +55 (41)-33287216
>
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 8 Aug 2016 22:09:22 -0400
> From: clark richards <clark.richards at gmail.com>
> To: Alex Demarsh <alexdemarsh at gmail.com>
> Cc: r-ug-ottawa at r-project.org
> Subject: Re: [OGRUG] Centres of ExpeRtise within GOC?
> Message-ID:
>         <CAJx09Ak8Ch_Hzf=FTk53U=Dj4QY7hwNb30sdwu3Euz_ufUdQrQ at mail.
> gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Hi Alex,
>
> Not sure if this is useful for you or not, but I'm a physical oceanographer
> that uses R for data analysis. Maybe not the kind of analytics you're
> referring to?
>
> While I'm not currently a GOC employee, I will be in a few weeks after I
> start a position as a research scientist at the Bedford Institute of
> Oceanography (BIO) in Halifax (in the middle of packing boxes right now!).
> I don't know of any specific "analytic teams" at BIO, but I do know that
> they are migrating much of their in-house data processing and archiving
> facilities from Matlab to R (and possibly some python). Physical
> oceanography has been (and continues to be) mostly dominated by Matlab, but
> I think that tide is turning, especially for government where the licenses
> are getting harder to justify.
>
> I am also the co-author of the R package `oce` which is aimed at
> oceanographers who work with data. I don't know what the usage of oce is
> like across the government, but I do think it's increasing across academia
> generally, as more students come up through the system with some exposure
> to R from their undergraduate degrees.
>
> Cheers,
> Clark
>
> On Mon, Aug 8, 2016 at 2:05 PM, Alex Demarsh <alexdemarsh at gmail.com>
> wrote:
>
> > Hey folks -
> >
> > Not sure if this is on-topic for this list, but I've become curious about
> > the prevalence of R use in the Government of Canada (GOC) - particularly
> > how many analytic teams are using R as their primary language.
> >
> > So, if you're a member of (or just know of) such an "R Shop", could you
> let
> > me know? Any information on specific tasks or level of expertise would
> be a
> > helpful addition.
> >
> > Many thanks in advance,
> >
> > Alex Demarsh
> > Epidemiologist/Biostatistician, Public Health Agency of Canada
> >
> >         [[alternative HTML version deleted]]
> >
> > _______________________________________________
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> > R-UG-Ottawa at r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-ug-ottawa
> >
>
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> End of R-UG-Ottawa Digest, Vol 40, Issue 1
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