SimpleODE

package odend;

import Jama.*;

/** 
 * a simple ODE for test purposes<br>
 * time dependent<br>
 * can be solved analytically
 */
public class SimpleODE extends ODE {
  
  /**
   * construct from given initial conditions x(t0)
   */
  public SimpleODE(double x0, double t0) {
    super(new Matrix(new double[] {x0}, 1), t0);
  }

  /** 
   * right hand side of ODE<br>
   * has explicit time dependence
   */
  public Matrix f(Matrix x, double t) {
    Matrix result = new Matrix(1,1);
    result.set(0,0, -x.get(0,0) * Math.sin(t));
    return result;
  }
}