search for: alb0331

...(b in periods$Bus) { if (periods[periods$Bus == b, "Island"] != map[b]) { print(b) print(periods[periods$Bus == b, "Island"][1:1]) print(map[b]) } } prints a number of lines where periods$Island does not match the corresponding value in map: [1] "ALB0331" [1] SI Levels: NI SI ALB0331 NI Levels: NI SI [1] "APS0111" [1] NI ... Clearly, I've missed the point here. Would anyone be so kind as help me find it or suggest which FM I might need to R? Cheers, Geoff [1] http://stackoverflow.com/questions/7547597/dictionary-style-r...