view src/samer/mds/ProximityFilter.java @ 0:bf79fb79ee13

Initial Mercurial check in.

package samer.mds;

import samer.maths.*;
import samer.tools.*;
import samer.core.types.*;
import java.util.*;

/** Compute component-wise filter coefficients using a
	a distance/proximity matrix. The filter kernel is centred on
	one of the elements, so that the coefficients are a function
	of the distance/proximity between each unit and the given
	"pivot" element.
*/
	 
public class ProximityFilter extends NullTask implements Observer {
	Matrix		R;
	VVector		F;
	VFunction	map;		// map from proximity to coeff.
	VInteger	i;			// centre element, num elements

	public ProximityFilter(Matrix R, VVector F, VFunction map) {
		this.R=R; this.F=F; this.map=map;
		i=new VInteger("pivot",0);
		i.setRange(0,R.getRowDimension()-1);

		R.addObserver(this);
		map.addObserver(this);
		i.addObserver(this);
	}
	public void run() { 	map.getFunction().apply(R.getArray()[i.value],F.array()); }
	public void update(Observable obs, Object arg) { run(); F.changed(); }
	public void dispose() {
		map.deleteObserver(this);
		R.deleteObserver(this);
		i.dispose();
	}
}