getTree.rf.madlib: MADlib wrapper function for Random Forest

In PivotalR: A Fast, Easy-to-Use Tool for Manipulating Tables in Databases and a Wrapper of MADlib

Description

This function is a wrapper of MADlib's random forest model get_tree function. The model built using madlib.randomForest is passed as input to this function.

Usage

getTree.rf.madlib(object, k=1, ...) 

Arguments

object	A random forest model object built using madlib.randomForest.
k	Id of the tree to be retrieved. Can range between 1 and maximum number of trees in the forest. default is 1.
...	Arguments to be passed to or from other methods.

Value

A data frame object similar to R's getTree result.

Author(s)

Author: Predictive Analytics Team at Pivotal Inc.

Maintainer: Frank McQuillan, Pivotal Inc. [e-mail]

References

[1] Documentation of random forest in MADlib 1.7, https://madlib.apache.org/docs/latest/

See Also

madlib.randomForest function to train a random forest model.

print.rf.madlib function to print summary of a model fitted through madlib.randomForest

predict.rf.madlib is a wrapper for MADlib's predict function for random forests.

madlib.lm, madlib.glm, madlib.summary, madlib.arima, madlib.elnet, madlib.rpart are all MADlib wrapper functions.

Examples

## Not run: 


## set up the database connection
## Assume that .port is port number and .dbname is the database name
cid <- db.connect(port = .port, dbname = .dbname, verbose = FALSE)

x <- as.db.data.frame(abalone, conn.id = cid, verbose = FALSE)
lk(x, 10)

## decision tree using abalone data, using default values of minsplit,
## maxdepth etc.
key(x) <- "id"
fit <- madlib.randomForest(rings < 10 ~ length + diameter + height + whole + shell,
       data=x)
fit
getTree.rf.madlib(fit, k=2)


db.disconnect(cid)

## End(Not run)

PivotalR documentation built on March 13, 2021, 1:06 a.m.