Calculate Phi or Cramer's V effect size

Simple function to calculate effect sizes for frequency tables.

Usage

cramerV(x)

Arguments

x

A frequency table, such as from xtabs().

Value

A numeric value with Phi for 2 x 2 tables or Cramer's V for tables larger than 2 x 2.

Examples

cramerV(xtabs(~ am + vs, data = mtcars))
#>       Phi 
#> 0.1683451 
cramerV(xtabs(~ cyl + vs, data = mtcars))
#> Cramer's V 
#>  0.8166228 
cramerV(xtabs(~ cyl + am, data = mtcars))
#> Cramer's V 
#>  0.5226355