I have a several character variables that I need to recode, but some of them have special characters like single quote or ( ). How tell R to ignore these special characters so I can rename them? Below is the error message I am getting. social$FamilySupport[social$FamilySupport=="Mr. XXXs' extended family live in the Nashville area where he and his wife reside."]<-"Highly Supportive" Warning in `[<-.factor`(`*tmp*`, social$FamilySupport == "Mr. XXXs' extended family live in the Nashville area where he and his wife reside.", : invalid factor level, NAs generated
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