From 2af3efaba010b97d0583912e8a215d9f89ebbafa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 20 Mar 2019 18:13:34 +0100
Subject: [PATCH] [probability] ExponentialLaw: fix
 cumulativeDistributiveFunctionAtAbscissa for value < 0

---
 apps/probability/law/exponential_law.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/apps/probability/law/exponential_law.cpp b/apps/probability/law/exponential_law.cpp
index b8111f9d9..152c6554f 100644
--- a/apps/probability/law/exponential_law.cpp
+++ b/apps/probability/law/exponential_law.cpp
@@ -47,6 +47,9 @@ bool ExponentialLaw::authorizedValueAtIndex(float x, int index) const {
 }
 
 double ExponentialLaw::cumulativeDistributiveFunctionAtAbscissa(double x) const {
+  if (x < 0.0) {
+    return 0.0;
+  }
   return 1.0 - std::exp((double)(-m_parameter1 * x));
 }