public Polynomial add(Polynomial px) {
Polynomial result = new Polynomial();
double coef;
double power;
Polynomial[] list = {this, px};
for (int i = 0; i < list.length; i++) {
for (Map.Entry<Double, Double> e : list[i].entrySet()) {
power = e.getKey();
coef = e.getValue();
if (result.containsKey(power)) {
coef += result.get(power);
}
result.put(power, coef);
}
}
return result;
}
/**
* checks if two polynomials are equal, to a tolerance
*
* @param px comparison polynomial
* @param TOL the difference between the coefficients acceptable
* @return true/false : the polynomials are equal
*/
public boolean equals(Polynomial px, double TOL) {
this.clean();
px.clean();
if (this.size() != px.size()) {
return false;
} else {
double coef;
double exponent;
Iterator<Map.Entry<Double, Double>> iter = this.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<Double, Double> e = iter.next();
coef = e.getValue();
exponent = e.getKey();
if (Math.abs(coef - px.get(exponent)) > TOL) {
return false;
}
}
return true;
}
}
