Regression analysis in R: backward selection
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- Опубликовано: 4 окт 2024
- Selecting variables for a linear model is dicey. Let's get started! If this vid helps you, please help me a tiny bit by mashing that 'like' button. For more #rstats joy, crush that 'subscribe' button!
You can find materials supporting this vid (and others) at github.com/equitable-equations/youtube.
Got it! Thank you very much. Now I can work through another great vid in your Regression series of vids (*all* your vids are excellent!).
Really interesting topic. Great video, really well explained!
Thanks for the great video. Really well done.
Thanks man!
Great video. Please also make a video on selection in logistic regression. And also how we can automate the removal of variables based on a criteria.
plz make video abour forward stepwise
Thank you sir.
I heard you mention this wouldn't be devoted to inference, but wondered if you could help me understand the pitfalls of stepwise elimination as its summarized in this sentence I found: "If you remove the insignificant terms and then refit, the inference results (p-values) would not include the "effect" of the previous selection". I can't wrap my head around what this means practically and what the implications might be. Any corrections or thoughts? Thank you, I really enjoy your videos!
Hi! Yes, that's a reasonable way of describing it. As a result of the process used to get them, the p-values of the remaining terms will be low after variable selection. You shouldn't use their lowness to draw conclusions about statistical significance.
Oh, ok! I don’t know why that was so hard for me to get. Thanks again! 😅
My humble request you to make videos regarding ggplot2 with tools geom_ point, geom_bar, geom_line, pie chart, geom_area and others geom relates charts with one single dataset with every charts all the syntax. It will be useful as a beginner. Thank you so much for your great effort. ❤❤❤❤
Hi! I've got vids on most of those geoms, including point (ruclips.net/video/-k5pvxyyi8o/видео.html) and bar (ruclips.net/video/HvOQFQzIg5c/видео.html). You might also be interested in my ggplot overview (ruclips.net/video/McL9MMwmIZY/видео.html), which covers a lot of geoms using only a few data sets.
Please give a link to the data set (performance.csv).
Added to github. Thanks!
Thank you for the very helpful video, and I have a question: Why do we need linear regression when there are machine learning methods?
Regression *is* a machine learning method, in fact the most important one. Anyhow my goal here is understanding, not just black-box prediction.