Hi! How to change parameters of a function during runtime. instead for example calling with column names subset(airquality, Day == 1, select = -Temp) i want call subset with column indices something like this. subset(airquality, xxx(names(airquality)[4])> 80 , select c(xxx(names(airquality)[3]),xxx(names(airquality)[4]))) In genereral I am interested in changing the parameters during runtime. for example i want to call at runtime instead of: plot(x,y,col=1). plot(x,y,log= "xy") by calling: myarg<-"log" myargval<-"xy" plot(x,y,xxx(myarg,myargval)) It is possible to do that? Sincerely Eryk -- _ _ \|/ \|/ ?v? 'v? 'v' //| |\\ //| |\\ //| |\\ ----m-m-----m-m-----m-m--------w-w----- \\| |// Eryk Witold Wolski .^. /|\ wolski at molen.mpg.de tel : 0049-(0)30-8413-1543 fax : 0049-(0)30-8413-1139 mobile : 0049-1793210931 http://www.molgen.mpg.de/~mass-spec http://www.molgen.mpg.de/~wolski -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._