/**
* Sets the maximum number of instances allowed in a leaf.
*
* @param num The maximum number of instances allowed in a leaf.
* @throws Exception If the num is < 2, as the method cannot work for < 2 instances.
*/
public void setMaxInstancesInLeaf(int num) throws Exception {
if (num < 2)
throw new Exception(
"The maximum number of instances in a leaf for "
+ "using MiddleOutConstructor must be >=2.");
super.setMaxInstancesInLeaf(num);
}
/**
* Parses a given list of options.
* <!-- options-start -->
* Valid options are:
*
* <p>
*
* <pre> -S <num>
* The seed for the random number generator used
* in selecting random anchor.
* (default: 1)</pre>
*
* <pre> -R
* Use randomly chosen initial anchors.</pre>
*
* <!-- options-end -->
*
* @param options the list of options as an array of strings
* @throws Exception if an option is not supported
*/
public void setOptions(String[] options) throws Exception {
super.setOptions(options);
String temp = Utils.getOption('S', options);
if (temp.length() > 0) {
setSeed(Integer.parseInt(temp));
} else {
setSeed(1);
}
setInitialAnchorRandom(Utils.getFlag('R', options));
}
/**
* Sets the master index array that points to instances in m_Instances, so that only this array is
* manipulated, and m_Instances is left untouched.
*
* @param instList The master index array.
*/
public void setInstanceList(int[] instList) {
super.setInstanceList(instList);
rootRadius = -1; // this needs to be re-calculated by buildTree()
}
/**
* Sets the instances on which the tree is to be built.
*
* @param insts The instances on which to build the ball tree.
*/
public void setInstances(Instances insts) {
super.setInstances(insts);
rootRadius = -1; // this needs to be re-calculated by buildTree()
}
