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10 results for “from:Alexandra Thorn”

Ranking submodels by AIC (more general question)
Alexandra Thorn · Jun 23, 2011 · r-help

Here's a more general question following up on the specific question I asked earlier: Can anybody recommend an R command other than mle.aic() (from the wle package) that will give back a ranked list of submodels? It seems...

working with ordinal predictor variables?
Alexandra Thorn · Oct 5, 2017 · r-help

I'm trying to develop a linear model for crop productivity based on variables published as part of the SSURGO database released by the USDA. My default is to just run lm() with continuous predictor variables as numeric, and discrete...

AIC() vs. mle.aic() vs. step()?
Alexandra Thorn · Jun 22, 2011 · r-help

I know this a newbie question, but I've only just started using AIC for model comparison and after a bunch of different keyword searches I've failed to find a page laying out what the differences are between the...

Ranking submodels by AIC (more general question)
Alexandra Thorn · Jun 23, 2011 · r-help

Thanks for the suggestion. Those functions only provide part of the functionality I want. After a great deal more of drawing the internet, I've concluded that the correct answer to my question is dredge() from the package MuMIn. It...

[example code] RE: AIC() vs. mle.aic() vs. step()?
Alexandra Thorn · Jun 23, 2011 · r-help

Ok, here's some example code showing how I get different output for AIC vs. mle.aic(). Now that I've taken another look at the independent variables, I'm wondering whether missing values in one of the variables might...

analyzing results from Tuesday's US elections
Alexandra Thorn · Nov 9, 2020 · r-help

This thread strikes me as pretty far off-topic for a forum dedicated to software support on R. https://www.r-project.org/mail.html#instructions "The ?main? R mailing list, for discussion about problems and solutions using R, announcements...

Mac/PC differences in lmer results
Alexandra Thorn · Jun 5, 2019 · r-help

To check whether the data are being read in appropriately, what happens when you plot the distribution of each of the independent variables on the respective systems? -A On Wed, 5 Jun 2019 12:32:28 +0200 Olivier Crouzet <olivier...

AIC() vs. mle.aic() vs. step()?
Alexandra Thorn · Jun 23, 2011 · r-help

The packages is wle. I'll put together some code that shows the behavior I'm talking about, and send it to the list. Alexandra On Thu, 2011-06-23 at 13:51 +0200, Rub?n Roa wrote: > I don...

[cleaned code] RE: AIC() vs. mle.aic() vs. step()?
Alexandra Thorn · Jun 23, 2011 · r-help

On Thu, 2011-06-23 at 09:29 -0400, Alexandra Thorn wrote: > Ok, here's some example code showing how I get different output for AIC > vs. mle.aic(). Now that I've taken another look at the independent > variables...

Help reinstalling rgdal (Ubuntu 16.04)
Alexandra Thorn · Aug 9, 2018 · r-help

Hi all, Following some updates to R that I received via Synaptic Package Manager on Ubuntu 16.04 (looks like I now have R 3.4.4-1xenial0), I have been unable to reinstall rgdal, and I need help. Initially...

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