I am trying to apply the following command in R Studio but it is giving me error. Can you please leet me know why it is not working with R Studio? residualPlots(our.lm, type="rstudent") Error in match.arg(type) : 'arg' should be one of “working”, “response”, “deviance”, “pearson”, “partial” Thanks, Dogar -- ------------------------------ This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email. [[alternative HTML version deleted]]