Variable selection procedures in R: Forward, backward, stepwise, and best-subsets regression (2020)

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You are the savior as all my classmates are using SAS and I am the only guy using R. Thanks Mike

sandiprijal
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Thank you so much Prof. Crowson for this very insightful video and also the additional educational materials. They have been very useful to me as a PhD candidate and I am very happy that I found your video.

letho
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how is this process done for a logistic regression (binary) model?

jeffreylau
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Thank you so much for sharing. I watched so many before I found your video and they were either using other softwares, not very clear or not covered the key points like the one at the end on "best subset" r function.

MrAMerang
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Hello, I have a question. Can we use this for ordinal logistic regression? I used mass package to perform my ordered logit model

shoumicshahid
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Hi, can i get more information on the dataset what are we analyzing? can I get description of the variables?

manishadinesh
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dear mike, This line FWDfit.p<-ols_step_forward_p(model, penter=.05) is not giving me the same thing it gave you ? it has no errors and at the same time it doesn't produce anything

edmondmalepane
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Thank you very much. Not tried yet but looking for this since 2 days

NEWGAMER-vd
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Thank you very much! When I run FWDfit.p<-ols_step_forward_p(model, penter=.05) it displays:
Error in Anova.lm(m) : residual df = 0, do you know what does it means?

denSILVA
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Good evening Mike, first of all thank you for the video :D. And second, does olsrr works with logistic regression? What i've read is just for linear models, (lm class, and not glm).

galan
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honestly man thank you, you're a life saver

thebutcher
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Mike, you made a great job! Thank you so much!!! Explained in detail.

nilufarrashitova
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Thanks you for the video .I have a huge data with 537 obs of 22 variables. I couldn't do the


modcompare
in my R version 3.6.3 (2020-02-29).

I will appreciate if you can give me your advices on how to do it?
Thanks.

marjanhajizadeh
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When i am running ols step forward p i am getting na in two of rows which are in including parts of variable

HarpreetKaur-bxej
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nice video, just wanted to know any similar package for Poisson regression analysis

muhammadsaleemkhan
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nice video, is there any similar function for using Poisson regression

muhammadsaleemkhan
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@mikecrowson2462, I was reviewing some model selection stuff and once again you remain an amazing resource. Thank you!

drryangagnon
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Thanks for the video. How can I do variable selection for the linear mixed model

KareemLongwe
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Does this fit only the forward selection ?
Using the o value method

edmondmalepane
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Would you please describe the process of these model selection process (forward/backward stepwise regression) in MATLAB?

shahja