logsparsedoublematrix2d.java

来自「CRF分类器,是一个很好的研究工具.用于中文信息处理的很好的工具」· Java 代码 · 共 30 行

/*
 * Created on May 18, 2005
 *
 */
package iitb.CRF;

import cern.colt.matrix.DoubleMatrix1D;
import cern.colt.matrix.DoubleMatrix2D;
import cern.colt.matrix.impl.SparseDoubleMatrix2D;

public class LogSparseDoubleMatrix2D extends SparseDoubleMatrix2D {
    static double map(double val) { return LogSparseDoubleMatrix1D.map(val);}
    static double reverseMap(double val) { return LogSparseDoubleMatrix1D.reverseMap(val);}
    public LogSparseDoubleMatrix2D(int numR, int numC) {super(numR,numC);
    }
    public DoubleMatrix2D assign(double val) {
        return super.assign(map(val));
    }
    public void  set(int row, int column, double val) {
        super.set(row,column,map(val));
    }
    public double  get(int row, int column) {
        return reverseMap(super.get(row,column));
    }
    
    public DoubleMatrix1D zMult(DoubleMatrix1D y, DoubleMatrix1D z, double alpha, double beta, boolean transposeA) {
        return RobustMath.logMult(this,y,z,alpha,beta,transposeA);
    }
};