How to Evaluate the Productivity of Software Ecosystem: A Case Study in GitHub

Table 3

The linear function of productivity related to the number of participants.

Languages	Equation of primary productivity	Equation of secondary productivity	Ac	C1	Ac^∗Cr	C2
C#	y = 5.46x − 31.985	y = 4.66x − 29.407	5.46	31.985	4.665	29.407
C++	y = 3.37x − 24.101	y = 2.69x − 31.796	3.37	24.101	2.690	31.796
C	y = 2.05x − 9.555	y = 0.97x − 6.834	2.05	9.555	0.967	6.834
Java	y = 2.94x − 13.341	y = 1.97x − 29.100	2.94	13.341	1.974	29.100
JavaScript	y = 2.05x − 5.639	y = 0.56x − 10.923	2.05	5.639	0.557	10.923
PHP	y = 1.93x + 11.439	y = 0.99x + 23.920	1.93	11.439	0.987	23.920
Python	y = 1.65x + 2.464	y = 0.94x − 19.103	1.65	2.464	0.941	19.103