If accuracy is 'the nearness of a calculation to the true value', and the
assumption is the relation between all variables remain linear, then I
don't see why accuracy wouldn't be useful in GLM.
On Friday, May 20, 2016 at 6:24:06 PM UTC-3, Kevin Liu wrote:
>
> Pkg.update() updated all packages, did the job, thanks. So suppose I have
> a dataset called train. R2(train), rˆ2(train), r2(train) didn't work.
>
> I meant predictive accuracy. Does it apply to GLM?
>
> On Friday, May 20, 2016 at 1:26:47 PM UTC-3, Milan Bouchet-Valat wrote:
>>
>> Le vendredi 20 mai 2016 à 08:59 -0700, Kevin Liu a écrit :
>> > I think accuracy doesn't make sense for a linear model whose purpose
>> > isn't to predict. Do you agree?
>> Sorry, I don't know what you mean by "accuracy". Anyway, only users
>> know the purpose of their models. All we can do is provide the support
>> for indicators and let them choose the appropriate ones.
>>
>>
>> Regards
>>
>> > > Pkg.update("GLM")
>> > > ERROR: MethodError: `update` has no method matching
>> > > update(::ASCIIString)
>> > >
>> > >
>> > >
>> > > > Le jeudi 19 mai 2016 à 19:08 -0700, Kevin Liu a écrit :
>> > > > > Thanks. I might need some help if I encounter problems on this
>> > > > pseudo
>> > > > > version.
>> > > > I've just tagged a new 0.5.2 release, so this shouldn't be
>> > > > necessary
>> > > > now (just run Pkg.update()).
>> > > >
>> > > >
>> > > > Regards
>> > > >
>> > > > > > Le jeudi 19 mai 2016 à 09:30 -0700, Kevin Liu a écrit :
>> > > > > > > It seems the pkg owners are still deciding
>> > > > > > >
>> > > > > > > Funcs to evaluate fit
>> > > >
>> > > > > > > https://github.com/JuliaStats/GLM.jl/issues/74
>> > > > > > > Add fit statistics functions and document existing ones ht
>> > > > tps://gith
>> > > > > > > ub.com/JuliaStats/StatsBase.jl/pull/146
>> > > > > > > Implement fit statistics functions
>> > > >
>> > > > > > > https://github.com/JuliaStats/GLM.jl/pull/115
>> > > > > > These PRs have been merged, so we just need to tag a new
>> > > > release. Until
>> > > > > > then, you can use Pkg.checkout() to use the development
>> > > > version
>> > > > > > (function is called R² or R2).
>> > > > > >
>> > > > > >
>> > > > > > Regards
>> > > > > >
>> > > > > > >
>> > > > > > > > I looked in GLM.jl but couldn't find a function for
>> > > > calculating the
>> > > > > > > > R2 or the accuracy of the R2 estimate.
>> > > > > > > >
>> > > > > > > > My understanding is that both should appear with the
>> > > > glm()
>> > > > > > > > function. Help would be appreciated.
>> > > > > > > >
>> > > > > > > > Kevin
>> > > > > > > >
>>
>
