Top "Lm" questions

The lm function is used to fit linear models in R. It can be used to carry out regression, single stratum analysis of variance and analysis of covariance.

Predict() - Maybe I'm not understanding it

I posted earlier today about an error I was getting with using the predict function. I was able to get …

r lm predict
Extract regression coefficient values

I have a regression model for some time series data investigating drug utilisation. The purpose is to fit a spline …

r regression lm
How to succinctly write a formula with many variables from a data frame?

Suppose I have a response variable and a data containing three covariates (as a toy example): y = c(1,4,6) d = data.…

r dataframe glm lm
R: numeric 'envir' arg not of length one in predict()

I'm trying to predict a value in R using the predict() function, by passing along variables into the model. I …

r lm predict
Linear model function lm() error: NA/NaN/Inf in foreign function call (arg 1)

Say I have data.frame a I use m.fit <- lm(col2 ~ col3 * col4, na.action = na.exclude) …

r nan lm kaggle
predict.lm() in a loop. warning: prediction from a rank-deficient fit may be misleading

This R code throws a warning # Fit regression model to each cluster y <- list() length(y) <- …

r statistics linear-regression lm
How to debug "contrasts can be applied only to factors with 2 or more levels" error?

Here are all the variables I'm working with: str(ad.train) $ Date : Factor w/ 427 levels "2012-03-24","2012-03-29",..: 4 7 12 14 19 21 24 29 31 34 ... $ Team : …

r regression lm glm r-faq
Extract R-square value with R in linear models

I know that using summary will help me to do this manually, however, I will have to calculted tons of …

r lm
Linear Regression and group by in R

I want to do a linear regression in R using the lm() function. My data is an annual time series …

r regression linear-regression lm
Getting Warning: " 'newdata' had 1 row but variables found have 32 rows" on predict.lm

I found peculiarity while using predict and lm function in R. I got different results for data frame and vector …

r prediction lm