First, install and fire-up R on your computer. Within R, one needs to install the mboost package by typing
install.packages("mboost")
and hitting the ENTER key. Once the package is installed, you can load it using
library("mboost")
Now all mboost functions are ready to be used, for example the mboost() function for fitting an additive regression model to the bodyfat data
data("bodyfat", package = "TH.data") ### formula interface: additive Gaussian model with ### a non-linear step-function in `age', a linear function in `waistcirc' ### and a smooth non-linear smooth function in `hipcirc' mod <- mboost(DEXfat ~ btree(age) + bols(waistcirc) + bbs(hipcirc), data = bodyfat)
The model can be plotted
layout(matrix(1:3, nc = 3, byrow = TRUE)) plot(mod, ask = FALSE, main = "formula")
or used for computing predictions
summary(predict(mod))
which can be compared to the actual response values:
plot(bodyfat$DEXfat, predict(mod)) abline(a = 0, b = 1)
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