public Secant(double x0, double x1, double tolerance, int maxIterations, F f) {
this.x0 = x0;
this.x1 = x1;
this.tolerance = tolerance;
this.maxIterations = maxIterations;
this.currentI = 2;
this.f = f;
this.q0 = f.eval(x0);
this.q1 = f.eval(x1);
}
@Override
public void step() {
x = x1 - q1 * (x1 - x0) / (q1 - q0);
if (currentI < maxIterations && finished != true) {
if (Math.abs(x - x1) < tolerance) {
foundSolution = true;
finished = true;
return;
}
currentI++;
x0 = x1;
q0 = q1;
x1 = x;
q1 = f.eval(x);
} else finished = true;
}
@Override
public String printStep() {
return String.format("\n%d %15f %15f", currentI, x1, f.eval(x1));
}
