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Add DataSeries>>#countNils and #countNonNils #218

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Merged
jecisc merged 1 commit into from
May 9, 2023
Merged

Add DataSeries>>#countNils and #countNonNils #218

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26 changes: 26 additions & 0 deletions src/DataFrame-Tests/DataSeriesTest.class.st
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Original file line number Diff line number Diff line change
Expand Up @@ -1058,6 +1058,32 @@ DataSeriesTest >> testCopyChangeDoesNotAffectOriginal [
self assert: original equals: expectedOriginalAfterChange
]

{ #category : #'tests - statistics' }
DataSeriesTest >> testCountNils [

| seriesWithNils |
keyArray := #( a b c d e f g h i j k ).

seriesWithNils := DataSeries
withKeys: keyArray
values: #( 3 7 6 20 nil 9 nil 10 15 13 nil )
name: 'ExampleSeries'.
self assert: seriesWithNils countNils equals: 3
]

{ #category : #'tests - statistics' }
DataSeriesTest >> testCountNonNils [

| seriesWithNils |
keyArray := #( a b c d e f g h i j k ).

seriesWithNils := DataSeries
withKeys: keyArray
values: #( 3 7 6 20 nil 9 nil 10 15 13 nil )
name: 'ExampleSeries'.
self assert: seriesWithNils countNonNils equals: 8
]

{ #category : #'tests - creation' }
DataSeriesTest >> testCreateDataSeriesAsDataSeries [

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14 changes: 14 additions & 0 deletions src/DataFrame/DataSeries.class.st
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Expand Up @@ -236,6 +236,20 @@ DataSeries >> correlationWith: otherSeries using: aCorrelationCoefficient [
^ aCorrelationCoefficient between: self and: otherSeries
]

{ #category : #statistics }
DataSeries >> countNils [
"Returns the number of nil values in the data series"

^ self count: [ :each | each isNil ]
]

{ #category : #statistics }
DataSeries >> countNonNils [
"Returns the number of non-nil values in the data series"

^ self count: [ :each | each isNotNil ]
]

{ #category : #statistics }
DataSeries >> crossTabulateWith: aSeries [
"A DataFrame is returned which is useful in quantitatively analyzing the relationship of values in one data series with the values in another data series"
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