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A-M baby

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Ingy döt Net 2013-04-10 21:29:02 -07:00
parent 764da6cbbb
commit db842d013d
19005 changed files with 197040 additions and 7 deletions
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Task/Multiple-regression/R/multiple-regression-2.r Normal file
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simpleMultipleReg <- function(formula) {
## parse and evaluate the model formula
mf <- model.frame(formula)
## create design matrix
X <- model.matrix(attr(mf, "terms"), mf)
## create dependent variable
Y <- model.response(mf)
## solve
solve(t(X) %*% X) %*% t(X) %*% Y
}
simpleMultipleReg(y ~ x + I(x^2))