What does the capital letter "I" in R linear regression formula mean?
) from the gaze of R's formula parsing code. It allows the standard R operators to work as they would if you used them outside of a formula, rather than being treated as special formula operators. For example: y ~ x + x^2 would, to R, mean "give me: x = the main effect of x, and; x^2 = the main effect and the second order interaction of x",
modeling - Extract formula from model in R - Stack Overflow
2012年3月14日 · I'm building a function for many model types which needs to extract the formula used to make the model. Is there a flexible way to do this? For example: x <- rnorm(10) y <- rnorm(10) z <-
Predict y value for a given x in R - Stack Overflow
2015年5月25日 · I have a linear model: mod=lm(weight~age, data=f2) I would like to input an age value and have returned the corresponding weight from this model. This is probably simple, but I have not found a s...
r - How to save summary (lm) to a file? - Stack Overflow
2015年5月21日 · I'm using R for a pharmacodynamic analysis and I'm fairly new to programming. The thing is, I'm carrying out linear regression analysis and in the future I will perform more advanced methods. Because I'm performing a large number of analysis (and I'm too lazy to manually copy paste every time I run the script), I would like to save the ...
r - How to succinctly write a formula with many variables from a …
You can check the package leaps and in particular the function regsubsets() functions for model selection. As stated in the documentation: As stated in the documentation: Model selection by exhaustive search, forward or backward stepwise, or sequential replacement
r - Adding lagged variables to an lm model? - Stack Overflow
2012年10月27日 · Have a look at e.g. the dynlm package which gives you lag operators. More generally the Task Views on Econometrics and Time Series will have lots more for you to look at.
r - model.matrix for full model - Stack Overflow
2023年2月28日 · I'm modeling "full linear model" (main effects, interactions of the second order and quadratic terms) in R but wondering on how to create all of these possible combinations in the simplest way, e.g., by model.matrix. For example, model with main effects and all possible interactions of the second order can be done such as
r - ChoiceModelR - Hierarchical Bayes Multinomial Logit Model
2013年11月8日 · I hope that some of you are a bit experienced with the R package ChoiceModelR by Sermas and Colias, to estimate a Hierarchical Bayes Multinomial Logit Model. Actually, I am quite a newbie on both R and Hierarchical Bayes. However, I tried to get some estimates by using the script provided by Sermas and Colias in the help file.
r caret - Saving and loading a model in R - Stack Overflow
2013年2月7日 · save(model, "model.RData") This will save your model as "model.RData" in the current working directory. You can find out what the working directory is by issuing the following:
Error saving an h2o model in R with h2o.saveModel
2015年12月11日 · I'm trying to save an h2o model in R with the next code: h2o.saveModel(myModel, path = "myPath/models ...