DataFrame/src/DataFrame/String.extension.st at scatterplot · PolyMathOrg/DataFrame

22 lines (20 loc) · 901 Bytes

Extension { #name : #String }
{ #category : #'*DataFrame' }
String >> using: aBlock [
	"Answer a block which takes two arguments: a data frame and a column name. This block groups a column of data frame which has name equal to myself by the values of another column, aggregates them using aBlock, and returns a new data series"
	^ [ :dataFrame :groupColumnName |
		dataFrame
			group: self
			by: groupColumnName
			aggregateUsing: aBlock ]
{ #category : #'*DataFrame' }
String >> using: aBlock as: aNewName [
	"Answer a block which takes two arguments: a data frame and a column name. This block groups a column of data frame which has name equal to myself by the values of another column, aggregates them using aBlock, and returns a new data series with aNewName"
	^ [ :dataFrame :groupColumnName |
		dataFrame
			group: self
			by: groupColumnName
			aggregateUsing: aBlock
			as: aNewName ]

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