Variance Inflation Factors
vif calculates variance-inflation and generalized variance-inflation factors for linear, generalized linear.
vif(model, merge_coef = FALSE)
model |
A model object. |
merge_coef |
Logical, whether to merge with coefficients of model summary matrix. Defaults to FALSE. |
A data frame with columns for variable and gvif, or additional columns for df and gvif^(1/(2*df)) if provided model uses factor variable.
data(germancredit) # Example I fit1 = glm(creditability~ age.in.years + credit.amount + present.residence.since, family = binomial(), data = germancredit) vif(fit1) vif(fit1, merge_coef=TRUE) # Example II fit2 = glm(creditability~ status.of.existing.checking.account + credit.history + credit.amount, family = binomial(), data = germancredit) vif(fit2) vif(fit2, merge_coef=TRUE)
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