lmBy {doBy} | R Documentation |
The data is split into strata according to the levels of the grouping factors and individual lm fits are obtained for each stratum.
lmBy(formula, data, id = NULL, ...)
formula |
A linear model formula object of the form y ~ x1+...+xn | g1+...gm. In the formula object, y represents the response, x1,...,xn the covariates, and the grouping factors specifying the partitioning of the data according to which different lm fits should be performed. |
data |
A dataframe |
id |
A formula describing variables from data which are to be available also in the output. |
... |
Additional arguments passed on to |
A list of lm fits.
This is a recent addition to the package; please report bugs.
Søren Højsgaard, sorenh@math.aau.dk
bb <- lmBy(1/uptake~log(conc)|Treatment, data=CO2) coef(bb) fitted(bb) residuals(bb) summary(bb) coef(summary(bb)) coef(summary(bb), simplify=TRUE)