dm: Dominance or Difference Matrix Creation

In orddom: Ordinal Dominance Statistics

Description

Returns a dominance or difference matrix based on the comparison of all values of two 1-column matrices x and y

Usage

dm(x, y, diff=FALSE)

Arguments

x	1 column matrix with n_1 values (e.g. from group X)
y	1 column matrix with n_2 values (e.g. from group Y)
diff	If argument is set to true, the function will return a difference matrix. Otherwise, a dominance matrix is produced.

Details

Each difference matrix cell value d_{ij} is calculated as y_j-x_i across all i=1,2,3,...,n_1 values (=rows) of x and i=1,2,3,...,n_2 values (=rows) of y. Dominance matrix cell values are calculated as sign(y_j-x_i).

Value

Returns difference or dominance matrix with X values as rownames and with Y values as columnnames

Author(s)

Jens Rogmann

References

Cliff, N. (1996). Ordinal Methods for Behavioral Data Analysis. Mahwah, NJ: Lawrence Erlbaum.

See Also

dms

Examples

## Not run: 
> x<-t(matrix(c(1,1,2,2,2,3,3,3,4,5),1))
> y<-t(matrix(c(1,2,3,4,4,5),1))
> dm(x,y,diff=TRUE)
  1  2  3  4  4  5
1 0 -1 -2 -3 -3 -4
1 0 -1 -2 -3 -3 -4
2 1  0 -1 -2 -2 -3
2 1  0 -1 -2 -2 -3
2 1  0 -1 -2 -2 -3
3 2  1  0 -1 -1 -2
3 2  1  0 -1 -1 -2
3 2  1  0 -1 -1 -2
4 3  2  1  0  0 -1
5 4  3  2  1  1  0
> dm(x,y)
  1  2  3  4  4  5
1 0 -1 -1 -1 -1 -1
1 0 -1 -1 -1 -1 -1
2 1  0 -1 -1 -1 -1
2 1  0 -1 -1 -1 -1
2 1  0 -1 -1 -1 -1
3 1  1  0 -1 -1 -1
3 1  1  0 -1 -1 -1
3 1  1  0 -1 -1 -1
4 1  1  1  0  0 -1
5 1  1  1  1  1  0

## End(Not run)

orddom documentation built on May 2, 2019, 2:45 a.m.