[R] A quick question about lm()

[Tobias Verbeke]

rlearner309 wrote:

> I have a simple regression using lm().

model <- lm(dist ~ speed, data = cars)
sModel <- summary(model)

> If I just want to check the coefficient, I can use summary(lm())$coef; if I
> need the standard error, I can use summary(lm())$s, if I need the residuals,

It is recommended to extract the information using coef() or resid() as in

coef(model)  # or coefficients(model)
resid(model) # or residuals(model)

> I can use summary(lm())$res.  OK.  How can I get the R-squares and Adjusted
> R-squares using $...?
> Is there a function, like objects(), that can show all the references for
> values?

str(sModel)

sModel$r.squared
sModel$adj.r.squared

HTH,
Tobias