gap (version 1.1-1)

s2k: Statistics for 2 by K table

Description

This function calculates one-to-others and maximum accumulated chi-squared statistics for a 2 by K contingency table.

Usage

s2k(y1,y2)

Arguments

y1

a vector containing the first row of a 2 by K contingency table

y2

a vector containing the second row of a 2 by K contingency table

Value

• The returned value is a list containing:
• x2a
  the one-to-other chisquare
• x2b
  the maximum accumulated chisquare
• col1
  the column index for x2a
• col2
  the column index for x2b
• p
  the corresponding p value

References

Hirotsu C, Aoki S, Inada T, Kitao Y (2001) An exact test for the association between the disease and alleles at highly polymorphic loci with particular interest in the haplotype analysis. Biometrics 57:769-778

Examples

# an example from Mike Neale
# termed 'ugly' contingency table by Patrick Sullivan
y1 <- c(2,15,16,35,132,30,25,7,12,24,10,10,0)
y2 <- c(0, 6,31,49,120,27,15,8,14,25, 3, 9,3)

result <- s2k(y1,y2)