//The exact value = intialValue*exp(drift*dt)*exp(volatility*sqrt(dt))-----can be obtained by integrating----->dx/x= drift*dt+volatility*sqrt(dt)
final Array evolve = process.evolve(process.time(date18.clone()), new Array(1).fill(6.7), .001, new Array(1).fill(new NormalDistribution().op(Math.random()) ));
System.out.println("Exact value = "+evolve.first());
//Calculating covariance of the process
final Matrix covariance = process.covariance(process.time(date18.clone()), new Array(1).fill(5.6), 0.01);
System.out.println("Covariance = "+covariance.get(0, 0));
clock.stopClock();
clock.log();
}