package com.twitter.common.stats;
/**
* Precision expresses the maximum epsilon tolerated for a typical size of input
* e.g.: Precision(0.01, 1000) express that we tolerate a error of 1% for 1000 entries
* it means that max difference between the real quantile and the estimate one is
* error = 0.01*1000 = 10
* For an entry like (1 to 1000), q(0.5) will be [490 <= x <= 510] (real q(0.5) = 500)
*/
public class Precision {
private final double epsilon;
private final int n;
/**
* Create a Precision instance representing a precision per number of entries
*
* @param epsilon is the maximum error tolerated
* @param n size of the data set
*/
public Precision(double epsilon, int n) {
this.epsilon = epsilon;
this.n = n;
}
public double getEpsilon() {
return epsilon;
}
public int getN() {
return n;
}
}