Example: Matrix and PrintMatrix

import com.imsl.math.*;

public class  MatrixEx1 {
    public static void main(String args[]) {
        double nrm1;
        double a[][] = {
            {0., 1., 2., 3.},
            {4., 5., 6., 7.},
            {8., 9., 8., 1.},
            {6., 3., 4., 3.}
        };
        
        //	Get the 1 norm of matrix a
        nrm1 = Matrix.oneNorm(a);
        
        //	Construct a PrintMatrix object with a title
        PrintMatrix p = new PrintMatrix("A Simple Matrix");
        
        //	Print the matrix and its 1 norm
        p.print(a);
        System.out.println("The 1 norm of the matrix is "+nrm1);
    }
}

Output

A Simple Matrix
   0  1  2  3  
0  0  1  2  3  
1  4  5  6  7  
2  8  9  8  1  
3  6  3  4  3  

The 1 norm of the matrix is 20.0