collinearity(formula, data, format = c("SeIF", "degrees", "radians", "VIF"))
Arguments
formula
a formula giving, on the right-hand side, the explanatory
variables to be considered. Iteractions, etc. may also be specified.
data
a data frame from which to draw the variables in the formula
format
choice of "SeIF" for inflation of standard errors,
"degrees" or "radians" for collinearity described as an angle
or "VIF" for the variance inflation factor (which is the square of SeIF).