/* Copyright (C) 2002 Univ. of Massachusetts Amherst, Computer Science Dept.
This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
http://www.cs.umass.edu/~mccallum/mallet
This software is provided under the terms of the Common Public License,
version 1.0, as published by http://www.opensource.org. For further
information, see the file `LICENSE' included with this distribution. */
/**
@author Andrew McCallum <a href="mailto:mccallum@cs.umass.edu">mccallum@cs.umass.edu</a>
*/
package cc.mallet.types;
public interface ConstantMatrix
{
public int getNumDimensions ();
public int getDimensions (int[] sizes);
public double value (int[] indices);
// Access using a single index, efficient for dense matrices, but not sparse
// Move to DenseMatrix?
public int singleIndex (int[] indices);
public void singleToIndices (int i, int[] indices);
public double singleValue (int i);
public int singleSize ();
// Access by index into sparse array, efficient for sparse and dense matrices
public int numLocations ();
public int location (int index);
public double valueAtLocation (int location);
// Returns a "singleIndex"
public int indexAtLocation (int location);
public double dotProduct (ConstantMatrix m);
public double absNorm ();
public double oneNorm ();
public double twoNorm ();
public double infinityNorm ();
public void print();
public boolean isNaN();
public ConstantMatrix cloneMatrix ();
}