SourceCode
diff --git a/‎core/src/processing/data/FloatDict.java‎
Lines changed: 22 additions & 6 deletions b/‎core/src/processing/data/FloatDict.java‎
Lines changed: 22 additions & 6 deletions
diff --git a/‎core/todo.txt‎
Lines changed: 5 additions & 0 deletions b/‎core/todo.txt‎
Lines changed: 5 additions & 0 deletions
@@ -411,13 +411,21 @@ public int minIndex() {
 
   public String minKey() {
     checkMinMax("minKey");
-    return keys[minIndex()];
+    int index = minIndex();
+    if (index == -1) {
+      return null;
+    }
+    return keys[index];
   }
 
 
   public float minValue() {
     checkMinMax("minValue");
-    return values[minIndex()];
+    int index = minIndex();
+    if (index == -1) {
+      return Float.NaN;
+    }
+    return values[index];
   }
 
 
@@ -452,17 +460,25 @@ public int maxIndex() {
   }
 
 
-  /** The key for a max value. */
+  /** The key for a max value, or null if everything is NaN (no max). */
   public String maxKey() {
     checkMinMax("maxKey");
-    return keys[maxIndex()];
+    int index = maxIndex();
+    if (index == -1) {
+      return null;
+    }
+    return keys[index];
   }
 
 
-  /** The max value. */
+  /** The max value. (Or NaN if they're all NaN.) */
   public float maxValue() {
     checkMinMax("maxValue");
-    return values[maxIndex()];
+    int index = maxIndex();
+    if (index == -1) {
+      return Float.NaN;
+    }
+    return values[index];
   }
 
 
 
@@ -19,6 +19,11 @@ X   drastic performance improvements for addRow()
 X when using setColumnType(), replace nulls with missingInt, missingFloat, etc
 X   formerly, was throwing a NullPointerException
 
+data types
+X if all data is NaN in a FloatDict, return NaN for maxValue() and minValue()
+X   formerly as AIOOBE -1 because -1 means "not found"
+X   but that was indexing directly into the data array
+_ add this handling for IntDict and others
 
 applet removal
 _ remove Applet as base class