From f58633b03c65e5f21f276530f274d33f0bef4f17 Mon Sep 17 00:00:00 2001
From: Hugo Saint-Vignes <hugo.saint-vignes@numworks.com>
Date: Fri, 23 Oct 2020 17:37:48 +0200
Subject: [PATCH] [apps/regression] Add escape case if data is not suitable for
 regression

Change-Id: Ie2e028a5030e1b0d3f133efdde971645d5b4687b
---
 apps/regression/store.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/apps/regression/store.cpp b/apps/regression/store.cpp
index a794ef3c6..e77e7547f 100644
--- a/apps/regression/store.cpp
+++ b/apps/regression/store.cpp
@@ -349,7 +349,12 @@ double Store::computeDeterminationCoefficient(int series, Poincare::Context * gl
   const int numberOfPairs = numberOfPairsOfSeries(series);
   for (int k = 0; k < numberOfPairs; k++) {
     // Difference between the observation and the estimated value of the model
-    double residual = m_data[series][1][k] - yValueForXValue(series, m_data[series][0][k], globalContext);
+    double evaluation = yValueForXValue(series, m_data[series][0][k], globalContext);
+    if (std::isnan(evaluation) || std::isinf(evaluation)) {
+      // Data Not Suitable for evaluation
+      return NAN;
+    }
+    double residual = m_data[series][1][k] - evaluation;
     ssr += residual * residual;
     // Difference between the observation and the overall observations mean
     double difference = m_data[series][1][k] - mean;