RosettaCodeData/Task/Multiple-regression/R/multiple-regression-4.r

22 lines
393 B
R

lm.impl <- function(formula) {
mf <- model.frame(formula)
X <- model.matrix(mf)
Y <- model.response(mf)
qr.coef(qr(X), Y)
}
lm(y ~ x + I(x^2))
# Call:
# lm(formula = y ~ x + I(x^2))
#
# Coefficients:
# (Intercept) x I(x^2)
# 128.81 -143.16 61.96
lm.impl(y ~ x + I(x^2))
# (Intercept) x I(x^2)
# 128.81280 -143.16202 61.96033