code: package cc.mallet.types;
  
  public interface Matrix extends ConstantMatrix
  {
  
  	public void setValue (int[] indices, double value);
  	public void setSingleValue (int i, double value);
  	public void incrementSingleValue (int i, double delta);
  
    public void setValueAtLocation (int loc, double value);
  
  	public void setAll (double v);
  	public void set (ConstantMatrix m);
  	public void setWithAddend (ConstantMatrix m, double addend);
  	public void setWithFactor (ConstantMatrix m, double factor);
  	public void plusEquals (ConstantMatrix m);
  	public void plusEquals (ConstantMatrix m, double factor);
  	public void equalsPlus (double factor, ConstantMatrix m);
  	public void timesEquals (double factor);
  	public void elementwiseTimesEquals (ConstantMatrix m);
  	public void elementwiseTimesEquals (ConstantMatrix m, double factor);
  	public void divideEquals (double factor);
  	public void elementwiseDivideEquals (ConstantMatrix m);
  	public void elementwiseDivideEquals (ConstantMatrix m, double factor);
  
  	public double oneNormalize ();
  	public double twoNormalize ();
  	public double absNormalize();
  	public double infinityNormalize ();
  	
  }
  