| 1 | /** |
| 2 | * |
| 3 | */ |
| 4 | package de.uka.ipd.sdq.probfunction.math.util; |
| 5 | |
| 6 | /** |
| 7 | * @author Ihssane |
| 8 | * |
| 9 | */ |
| 10 | public class Line { |
| 11 | |
| 12 | private double a; |
| 13 | private double b; |
| 14 | |
| 15 | /** |
| 16 | * @param x1 |
| 17 | * @param y1 |
| 18 | * @param x2 |
| 19 | * @param y2 |
| 20 | */ |
| 21 | public Line(double x1, double y1, double x2, double y2) { |
| 22 | if (x2-x1 == 0.0) { |
| 23 | throw new RuntimeException("Two samples of the PDF have the same value. Note that an initial sample with value 0 is assumed, so you must not specify another one with value 0. Values: "+x1+" and "+x2); |
| 24 | } |
| 25 | a = (y2 - y1) / (x2 - x1); |
| 26 | b = y1 - (a * x1); |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * @param y |
| 31 | * @return |
| 32 | */ |
| 33 | public double getX(double y) { |
| 34 | double result = (y-b)/a; |
| 35 | return result; |
| 36 | } |
| 37 | } |