#isNumerical should return true when columns includes nils

Author: jecisc

src/DataFrame-Tests/DataSeriesTest.class.st

@@ -1392,6 +1392,19 @@ DataSeriesTest >> testInjectInto [
 	self assert: actual equals: expected
 ]
 
+{ #category : #'tests - testing' }
+DataSeriesTest >> testIsNumerical [
+
+	self assert: #( 1 2 3 ) asDataSeries isNumerical.
+	self deny: #( 1 2 '3' ) asDataSeries isNumerical
+]
+
+{ #category : #'tests - testing' }
+DataSeriesTest >> testIsNumericalWithNils [
+
+	self assert: #( 1 nil 3 ) asDataSeries isNumerical
+]
+
 { #category : #'tests - accessing' }
 DataSeriesTest >> testLast [
 

src/DataFrame/DataSeries.class.st

@@ -420,7 +420,8 @@ DataSeries >> isCategorical [
 
 { #category : #'categorical-numerical' }
 DataSeries >> isNumerical [
-	^ forcedIsNumerical ifNil: [self uniqueValues allSatisfy: [:each|each isNumber]]
+
+	^ forcedIsNumerical ifNil: [ (self uniqueValues copyWithout: nil) allSatisfy: [ :each | each isNumber ] ]
 ]
 
 { #category : #testing }