hex.tree.xgboost

Class XGBoostUtils

java.lang.Object

hex.tree.xgboost.XGBoostUtils

public class XGBoostUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
XGBoostUtils()

Method Summary

Modifier and Type	Method and Description
static hex.tree.xgboost.XGBoostUtils.FeatureProperties	assembleFeatureNames(hex.DataInfo di)
static ml.dmlc.xgboost4j.java.DMatrix	convertChunksToDMatrix(water.Key<hex.DataInfo> dataInfoKey, water.fvec.Chunk[] chunks, int response, int weight, int fold, boolean sparse) convert a set of H2O chunks (representing a part of a vector) to a sparse DMatrix
static ml.dmlc.xgboost4j.java.DMatrix	convertFrameToDMatrix(water.Key<hex.DataInfo> dataInfoKey, water.fvec.Frame f, boolean onlyLocal, java.lang.String response, java.lang.String weight, java.lang.String fold, boolean sparse) convert an H2O Frame to a sparse DMatrix
static java.lang.String	makeFeatureMap(water.fvec.Frame f, hex.DataInfo di)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

XGBoostUtils

public XGBoostUtils()

Method Detail

makeFeatureMap

public static java.lang.String makeFeatureMap(water.fvec.Frame f,
                                              hex.DataInfo di)

convertFrameToDMatrix

public static ml.dmlc.xgboost4j.java.DMatrix convertFrameToDMatrix(water.Key<hex.DataInfo> dataInfoKey,
                                                                   water.fvec.Frame f,
                                                                   boolean onlyLocal,
                                                                   java.lang.String response,
                                                                   java.lang.String weight,
                                                                   java.lang.String fold,
                                                                   boolean sparse)
                                                            throws ml.dmlc.xgboost4j.java.XGBoostError

convert an H2O Frame to a sparse DMatrix

Parameters:

f - H2O Frame

onlyLocal - if true uses only chunks local to this node

response - name of the response column

weight - name of the weight column

fold - name of the fold assignment column

Returns:

DMatrix

Throws:

ml.dmlc.xgboost4j.java.XGBoostError

convertChunksToDMatrix

public static ml.dmlc.xgboost4j.java.DMatrix convertChunksToDMatrix(water.Key<hex.DataInfo> dataInfoKey,
                                                                    water.fvec.Chunk[] chunks,
                                                                    int response,
                                                                    int weight,
                                                                    int fold,
                                                                    boolean sparse)
                                                             throws ml.dmlc.xgboost4j.java.XGBoostError

convert a set of H2O chunks (representing a part of a vector) to a sparse DMatrix

Parameters:

response - name of the response column

weight - name of the weight column

fold - name of the fold assignment column

Returns:

DMatrix

Throws:

ml.dmlc.xgboost4j.java.XGBoostError

assembleFeatureNames

public static hex.tree.xgboost.XGBoostUtils.FeatureProperties assembleFeatureNames(hex.DataInfo di)