stand_quali function

Standardization of the qualitative variables

pretreatment of qualitative variables

stand_quali(X.quali, metric = "chisq")

Arguments

• X.quali: : a factor or a data frame with several factors
• metric: : the metric to be used, i.e. each category is weighted by the inverse of the square-root of its relative frequency

Returns

Xdisj.sd : a standardized matrix with as many columns as categories associated with the qualitative variables.