// generateTrainingInstances generates RandomFeatures number of
// attributes and returns a modified version of base.Instances
// for training the model
func (b *BaggedModel) generateTrainingInstances(model int, from *base.Instances) *base.Instances {
insts := from.SampleWithReplacement(from.Rows)
selected := b.generateTrainingAttrs(model, from)
return insts.SelectAttributes(selected)
}