Klasse TestMatrix

/** TestMatmul:
 *   simple class to test the matrix multiplikation
 */

public class TestMatrix {
    
  private SquareMatrix a, b, c;
    
  public TestMatrix(int n) {
    a = new SquareMatrix(n);
    b = new SquareMatrix(n);
    c = new SquareMatrix(n);
    
    // initialize a and b
    for (int i = 1; i <= n; i++) {
      for (int j = 1; j <= n; j++) {
		a.set(i, j, i + j);
		b.set(i, j, i - j);
      }
      b.set(i, i, 1.0);
    }
  }
  
  public void run() {
    a.mult(b, c);
  }
  
  public void check() {
    int n = a.shape()[0];
    
    double sp_th = n * (n + 1);
    double sp = c.trace();
    
    double c12_th = (n * n * n - 7 * n + 9) / 3.0;
    double c12 = c.get(1, 2);
    
    System.out.println("trace (expected)  : " + sp_th);
    System.out.println("trace             : " + sp);
    System.out.println("c(1,2) (expected) : " + c12_th);
    System.out.println("c(1,2)            : " + c12);
  }
  
  static public void main(String[] args) {
    TestMatrix tm = new TestMatrix(300); // initializes everything
    tm.run();
    tm.check();
  }
}