Software Defect Prediction Based on Hybrid Swarm Intelligence and Deep Learning

Table 1

Commonly used software metrics for process-oriented software.

Category	Metrics
McCabe metrics	Cyclomatic complexity ()
	Essential complexity (ev())
	Module design complexity (iv())
Halstead metrics	Unique operators ()
	Unique operands ()
	Total operators ()
	Total operands ( )
	Vocabulary ()
	Length ()
	Program volume ()
	Program difficulty ()
	Program level (Lv)
	Intelligence (I)
	Programming effort ()
	Programming time (T)
LOC metrics	LOCphy
	LOComment
	LOBlank
	LOCComment
Reformatted code information for file	Total source lines
	Expansion factor
Procedure information	Average length of basic blocks
	Procedure entry points
	Procedure exit points
Comments associated with procedures	Total comments
	Comments in headers
	Comments in declarations
Ratio of comments to executable lines	Executable reformatted lines
	Total comments/Executable lines
	Header comments/executable lines
	Declaration comments/executable lines
	Code comments/executable lines
Complexity metrics	Knots
Loop/interval analysis	Number of loops
	Depth of loop nesting
	Number of order 1 intervals
	Maximum interval nesting
	Reducible intervals
LCSAJ and unreachability	Total LCSAJs
	Reachable LCSAJs
	Unreachable LCSAJs
	Maximum LCSAJ density
	Unreachable lines
	Unreachable branches
Dataflow information	Globals in procedure
	File fan in
	Fan out