Figure 1
Contingency table derived from collaborations_
| (Co-)author from Y | No (co-)author from Y | row sums | |
|---|---|---|---|
| (Co-)author from X | CXY | CX – CXY | CX |
| No (co-)author from X | CY – CXY | T – CX – CY + CXY | T – CX |
| column sums | CY | T – CY | T |
General contingency table_
| e does possess attribute Y | e does not possess attribute Y | row sums | |
|---|---|---|---|
| e does possess attribute X | Number of elements possessing X and Y | Number of elements possessing X but not Y | Number of elements possessing X |
| e does not possess attribute X | Number of elements possessing Y but not X | Number of elements possessing neither X nor Y | Number of elements not possessing X |
| column sums | Number of elements possessing Y | Number of elements not possessing Y | Number of elements |
Simplified general contingency table_
| Y | not Y | |
|---|---|---|
| X | a | b |
| not X | c | d |