Linear regression of same outcome, similar number of covariates and one unique covariate in each model

Question

I want to run linear regression for the same outcome and a number of covariates minus one covariate in each model. I have looked at the example on this page but could that d

Answer 1

Following this example you could do this:

lapply(1:3, function(i){
    lm(as.formula(sprintf("y ~ x%i + x4 + x5", i)), a)
})