An Empirical Study of Software Metrics Diversity for Cross-Project Defect Prediction

Table 2

Four types of software metrics will be involved in this paper.

Category	Metric description
Process metrics (15-dimension)	numberOfVersionsUntil	avgLinesAddedUntil	maxLinesAddedUntil
	numberOfFixesUntil	linesRemovedUntil	maxCodeChurnUntil
	numberOfRefactoringsUntil	maxLinesRemovedUntil	avgCodeChurnUntil
	numberOfAuthorsUntil	avgLinesRemovedUntil	ageWithRespectTo
	linesAddedUntil	codeChurnUntil	weightedAgeWithRespectTo
CK-OO metrics (17-dimension)	Coupling between object classes	Response for a Class	numberOfMethodsInherited
	Depth of Inheritance Tree	Weighed Methods per Class	numberOfPrivateAttributes
	Afferent Couplings	numberOfAttributes	numberOfPrivateMethods
	Efferent Couplings	numberOfAttributesInherited	numberOfPublicAttributes
	Lack of Cohesion in Methods	numberOfLinesOfCode	numberOfPublicMethods
	Number of Children	numberOfMethods
Structural metrics	A d-dimensional space of features (d = 32)
Semantic metrics	A d-dimensional space of features (d = 32)