subset(dataframe, County==”CONWY”, c(N,date,hospital))

subsetting using an OR relation.

con2<-subset(ae,(AREA=="CONWY" & HEORG=="Ffestiniog_MIU" | AREA=="GWYNEDD" & HEORG=="Ffestiniog_MIU"), c(AT,AREA,DT_3,HEORG), order=c(HEORG,DT_3))