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Questions tagged [mumin]

MuMIn (**Mu**lti**m**odel **In**ference) is an R package for model selection and model averaging based on information criteria (AICc and alike).

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dredge in MuMin (R) keeps models with higher order terms without their respective lower order terms

I am using the function dredge from package MuMin for model selection. My model has a polynomial in it. I was under the impression (https://www.rdocumentation.org/packages/MuMIn/versions/1.42.1/topics/dredge, see "Interactions") that MuMin as…
agorapotatoes
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R MuMIn model.avg() - relative importance not working with pasted formulae

I am trying to use MuMIn's model.avg function with model formulae that are pasted and use an index rather than directly input, for example: m1<-gls(as.formula(paste(response,"~",paste(combns[,j], collapse="+"))), data=dat) 'combns' is a 2D array…
Meghann Mears
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model selection with tweedie distributions in MuMIn package R

I'm trying to do AICc model selection and model averaging with tweedie (compound Poisson) distributed data in R. I was working with the AICcmodavg R package with no success, then decided to try out the MuMIn package when I came across the…
RachelF
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Models fail to converge when using MuMIn::dredge

I am getting some error from the MuMIn::dredge function in R and do not know how to solve it. Here is my data ... library(lme4) library(MuMIn) library(arm) I constructed a global model: options(na.action = "na.fail") global.model<-lmer(yld.res ~…
user53020
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(R MuMIn) dredge function subsetting error

I am trying to select out variables using a correlation matrix as the "subset" argument with dredge() in MuMIn (R). My problem is precisely as described in this unresolved post: I run a model fm1*, and use dredge to test all combinations of…
PaulC
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Standardisation in MuMIn package in R

I am using the 'MuMIn' package in R to select models and calculate effect sizes of the input variables (rain, brk, onset, wid). To make my effect size comparable between variables, I standardised them using standardize function in arm package. Here…
user3013423
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no 'nobs' method available: Using the MuMIn package with simultaneous autoregression models

I'm hoping someone can help me figure out why the MuMIn package is not working with my simultaneous autoregression models. I have double checked the documentation for the package and it lists sarlm as one of the supported model types. However, when…
Kristin
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MuMIn dredge gam error using default na.omit

I have a global model I'm trying to dredge, but I keep getting the error "Error in dredge(myglobalmod, evaluate = TRUE, trace = 2) : 'global.model' uses 'na.action' = "na.omit" I tried running the global model with na.action="na.omit" within the…
leslie roberson
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gamlss compatibility with MuMIn

I recently tried to conduct model averaging on a glm fitted with gamlss using MuMIn's dredge function and am getting the same error as these two other users here and here. Here is a reproducible example and the error: library(gamlss) library(MuMIn)…
Conrad
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Why do I keep getting this error when I run the dredge function in R: "Error in MuMIn::dredge(global.model = ols) : result is empty"?

I keep getting this error when I run the dredge function in R: "Error in MuMIn::dredge(global.model = ols) : result is empty", and I'm not sure What is wrong. Here is my coding:R coding FYI I didn't include all of the formula (it got cut off in the…
Nicki
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get.models function from package MuMIn - subset

I am using the get.models command from package MuMIn in R Studio. I am working off my supervisor's code, and he has used the subset command throughout his code. I don't understand what the subset = 2, or subset = 3, refers to and I can't find it…
Evie McCloughan
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Why do I have negative degrees of freedom in top model using MuMIn Dredge?

I have been using the dredge function in the MuMIn package to conduct model averaging on my global GAM model (using bam from the mgcv package), with a priori selected explanatory variables and two random effects and a negative binomial…
mikejwilliamson
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How can I calculate the marginal r^2 for linear mixed models in SPSS for a simple random slope model?

TLDR: How can I get the marginal and conditional R^2 corresponding to the Johnson, P. C. (2014) paper to a simple random slope models with unstructured covarience type and a single random slope in SPSS? Longer: In R I am using the r.squaredGLMM()…
user2803922
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Is there any way to dredge a PGLMM_compare model in R (Phyr and MuMin packages)?

I am doing a comparative analysis, and my response variables are 0 or 1, therefore I need to do a phylogenetically-corrected analysis with a binomial error distribution. I used the PGLMM_compare function from the phyr package…
CRB
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Model averaging with MuMIn: interpretation of coefficient-names in results

I am doing model averaging with MuMIn and trying to interpret the results. Everything works fine, but I am wondering about the names of my coefficients in the results: Model-averaged coefficients: (full average) Estimate Std.…
annadelius
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