commit 13aee592b189fdfc803b6380318dba4853d4c476
author Daniel Cohen Gindi <danielgindi@gmail.com> Wed Jan 22 13:43:42 2020 +0200
committer Daniel Cohen Gindi <danielgindi@gmail.com> Wed Jan 22 13:43:42 2020 +0200
tree aa2efd216fe4f9b18e7832061805b7efcef59813
parent c97c8d247f0a882ce1a034d2f08700a5550564f4

Improve min/max calculation

https://github.com/danielgindi/Charts/pull/3650

MPChartLib/src/main/java/com/github/mikephil/charting/components/YAxis.java

diff --git a/MPChartLib/src/main/java/com/github/mikephil/charting/components/YAxis.java b/MPChartLib/src/main/java/com/github/mikephil/charting/components/YAxis.java
index a4e58c1..d2071ec 100644
--- a/MPChartLib/src/main/java/com/github/mikephil/charting/components/YAxis.java
+++ b/MPChartLib/src/main/java/com/github/mikephil/charting/components/YAxis.java
@@ -427,6 +427,26 @@
         float min = dataMin;
         float max = dataMax;
 
+        // Make sure max is greater than min
+        // Discussion: https://github.com/danielgindi/Charts/pull/3650#discussion_r221409991
+        if (min > max)
+        {
+            if (mCustomAxisMax && mCustomAxisMin)
+            {
+                float t = min;
+                min = max;
+                max = t;
+            }
+            else if (mCustomAxisMax)
+            {
+                min = max < 0f ? max * 1.5f : max * 0.5f;
+            }
+            else if (mCustomAxisMin)
+            {
+                max = min < 0f ? min * 0.5f : min * 1.5f;
+            }
+        }
+
         float range = Math.abs(max - min);
 
         // in case all values are equal