Bootstrap aggregation for a random forest algorithm.

pseudobootstrap.java

//bootstrap aggregating of training data for a random forest
Random rand = new Random(seed);
treenode tree[] = new treenode[trees] ;
for(int k=0;k<trees;k++){
  ArrayList<Datapoint> treedata = new ArrayList<Datapoint>()
  for (int j = 0; j < datapermodel; j++){
  	//add a random data point to the training data for this tree
  	int nj = Math.abs(rand.nextInt())%data.size();
  	treedata.add(alldata.get(nj)) ;
  }
  tree[k]=new treenode(treedata,minpoints,maxdepth, featurefraction);
}