An Empirical Study of Social Networks Metrics in Object-Oriented Software

Table 5

Eclipse 2.1. Pearson correlation among metrics.

	Num. issue	Num. bug	LOCS	WMC	RFC	LCOM	CBO	Fan-in	Fan-out	Reach efficiency	Eff.size	Closeness	Dwreach	Infocentrality	Size	Ties	Nweakcomp
Numbug	97%**	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
LOCS	53%**	53%**		—	—	—	—	—	—	—	—	—	—	—	—	—	—
WMC	49%**	48%**	57%**	—	—	—	—	—	—	—	—	—	—	—	—	—	—
RFC	58%**	59%**	68%**	92%**	—	—	—	—	—	—	—	—	—	—	—	—	—
LCOM	32%**	30%**	19%**	79%**	62%**	—	—	—	—	—	—	—	—	—	—	—	—
CBO	54%**	55%**	65%**	41%**	70%**	11%**	—	—	—	—	—	—	—	—	—	—	—
Fanin	18%**	17%**	62%**	30%**	26%**	26%**	4%**	—	—	—	—	—	—	—	—	—	—
Fanout	51%**	52%**	62%**	30%**	58%**	3%**	94%**	−1%	—	—	—	—	—	—	—	—	—
Reachآ ­efficiency	0%	1%	4%**	−4%**	−1%	−3%**	9%**	−14%**	14%**	—	—	—	—	—	—	—	—
Effsize	30%**	29%**	25%**	36%**	40%**	26%**	29%**	96%**	26%**	−10%**	—	—	—	—	—	—	—
Closeness	−2%	−2%	−1%	−1%**	−2%	0%	−3%	−1%	−3%*	−5%**	−2%*	—	—	—	—	—	—
Dwreach	27%**	27%**	23%**	17%**	29%**	4%**	46%**	19%**	50%**	44%**	32%**	−18%**	—	—	—	—	—
Infocentrality	−2%*	−2%*	−2%	−2%	−3%*	0%	−4%**	−1%	−5%**	−61%**	−2%*	94%**	−25%**	—	—	—	—
Size	32%**	31%**	28%**	38%**	42%**	26%**	32%**	95%**	29%**	−10%**	100%**	−2%	34%**	−3%*	—	—	—
Ties	32%**	31%**	27%**	43%**	45%**	37%**	27%**	87%**	23%**	−9%**	89%**	−1%	21%**	−2%	89%**	—	—
Nweakcomp	−23%**	−23%**	−27%**	−18%**	−28%**	−2%*	−39%**	−14%**	−40%**	−2%**	−21%**	4%**	−15%**	5%**	−25%**	−22%**	—
Brokerage	16%**	15%**	9%**	30%**	26%**	35%**	8%**	85%**	3%*	−5%**	83%**	0%	12%**	−1%	82%**	88%**	−7%**

**Correlation is significant at the 0.01 level. *Correlation is significant at the 0.05 level.