/*
* Copyright (c) 2009-2012, Peter Abeles. All Rights Reserved.
*
* This file is part of Efficient Java Matrix Library (EJML).
*
* EJML is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* EJML is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EJML. If not, see <http://www.gnu.org/licenses/>.
*/
package org.ejml.data;
import org.ejml.ops.MatrixIO;
import org.ejml.simple.SimpleMatrix;
/**
* <p>
* Describes a rectangular submatrix inside of a {@link D1Matrix64F}.
* </p>
*
* <p>
* Rows are row0 <= i < row1 and Columns are col0 <= j < col1
* </p>
*
* @author Peter Abeles
*/
public class D1Submatrix64F {
public D1Matrix64F original;
// bounding rows and columns
public int row0,col0;
public int row1,col1;
public D1Submatrix64F() {
}
public D1Submatrix64F(D1Matrix64F original,
int row0, int row1, int col0, int col1) {
this.original = original;
this.row0 = row0;
this.col0 = col0;
this.row1 = row1;
this.col1 = col1;
}
public D1Submatrix64F(D1Matrix64F original) {
this.original = original;
row1 = original.numRows;
col1 = original.numCols;
}
public int getRows() {
return row1 - row0;
}
public int getCols() {
return col1 - col0;
}
public double get(int row, int col ) {
return original.get(row+row0,col+col0);
}
public void set(int row, int col, double value) {
original.set(row+row0,col+col0,value);
}
public SimpleMatrix extract() {
SimpleMatrix ret = new SimpleMatrix(row1-row0,col1-col0);
for( int i = 0; i < ret.numRows(); i++ ) {
for( int j = 0; j < ret.numCols(); j++ ) {
ret.set(i,j,get(i,j));
}
}
return ret;
}
public void print() {
MatrixIO.print(System.out,original,"%6.3f",row0,row1,col0,col1);
}
}