A PMML package for R that exports all kinds of predictive models is available directly from CRAN.
Traditionally, the pmml package offered support for the following data mining algorithms:
- ksvm (kernlab): Support Vector Machines
- nnet: Neural Networks
- rpart: C&RT Decision Trees
- lm & glm (stats): Linear and Binary Logistic Regression Models
- arules: Association Rules
- kmeans and hclust: Clustering Models
Recently, it has been expanded to support:
- multinom (nnet): Multinomial Logistic Regression Models
- glm (stats): Generalized Linear Models for classification and regression with a wide variety of link functions
- randomForest: Random Forest Models for classification and regression
- coxph (survival): Cox Regression Models to calculate survival and stratified cumulative hazards
- naiveBayes (e1071): Naive Bayes Classifiers
- glmnet: Linear ElasticNet Regression Models
The pmml package can also export data transformations built with the pmmlTransformations
package (see below). It can also be used to merge two disctinct PMML
files into one. For example, if transformations and model were saved
into separate PMML files, it can combine both files into one, as
described in Chapter 5 of the PMML book - PMML in Action.
How does it work?
Simple, once you build your model using any of the supported model
types, pass the model object as an input parameter to the pmml function
as shown in the figure below:
Example - sequence of R commands used to build a linear regression model using lm and the Iris dataset:
Example - sequence of R commands used to build a linear regression model using lm and the Iris dataset:
Documentation
For more on the pmml package, please take a look at the paper we published in The R Journal. For that, just follow the link below:
1) Paper: PMML: An Open Standard for Sharing Models
Also, make sure to check out the package's documentation from CRAN:
2) CRAN: pmml Package
1) Paper: PMML: An Open Standard for Sharing Models
Also, make sure to check out the package's documentation from CRAN:
2) CRAN: pmml Package
R PMML Transformations Package
This is a brand new R package. Called pmmlTranformations, this package transforms data and when used in conjunction with the pmml
package, it allows for data transformations to be exported together
with the predictive model in a single PMML file. Transformations
currently supported are:
How does it work?
The pmmlTransformations package works in tandem with the pmml package so that data pre-processing can be represented together with the model in the resulting PMML code.
In R, as shown in the figure below, this process includes three steps:
- With the use of the pmmlTransformations package, transform the raw input data as appropriate
- Use transformed and raw data as inputs to the modeling function/package (hclust, nnet, glm, ...)
- Output the entire solution (data pre-processing + model) in PMML using the pmml package
Example - sequence of R commands used to build a linear regression model using lm with transformed data
Documentation
1) KDD Paper: The R pmmlTransformations Package
Also, make sure to check out the package's documentation from CRAN:
2) CRAN: pmmlTransformations Package
2) CRAN: pmmlTransformations Package
