Coocurrence matrix.

A coocurrence object consists of a matrix with the number of ocurrences in its main diagonal and the number of coocurrences outside this diagonal. Besides, this object has two attributes: 1) n is the total of the sum of the ocurrences in each row.2) m is the sum of the maximum number of ocurrences in each row.

coocur(ocurrences, minimum = 1, maximum = Inf,
       sort = FALSE, decreasing = TRUE)

Arguments

ocurrences	an ocurrence matrix or data frame
minimum	minimum frequency to be considered
maximum	maximum frequency to be considered
sort	sort the coincidence matrix according to frequency of events
decreasing	decreasing or increasing sort of the matrix

Details

Produce a matrix of coocurrences from a matrix of occurences.

Value

An object of cooc class with a coocurrence matrix. It has two attributes:

n

Total sum of occurences)

m

Sum of maximum occurences in each row of the ocurrence matrix

Author

Modesto Escobar, Department of Sociology and Communication, University of Salamanca. See https://sociocav.usal.es/blog/modesto-escobar/

Examples

## Tossing two coins five times.
D<-data.frame(Head=c(2,1,1,0,2),Tail=c(0,1,1,2,0))
coocur(D)
#> n= 10; m= 8
#>      Head Tail
#> Head    6     
#> Tail    2    4