Also, you could try: library(plyr) indx <- ddply(Prices.df,.(rowID),summarise, !findInterval(Price,unique(upperLimit[match(rowID,names(upperLimit))])))[,2] Prices.df[indx,] Prices.df[!indx,]
#or indx1 <- !with(Prices.df,ave(seq_along(Price),rowID,FUN=function(x) findInterval(Price[x],unique(upperLimit[match(rowID[x],names(upperLimit))])))) Prices.df[indx1,] Prices.df[!indx1,] A.K. On Saturday, February 15, 2014 12:19 PM, arun <smartpink...@yahoo.com> wrote: May be this helps: Prices.df <- read.table(text="rowID Price 1 'Full Season' 417.95 2 'Full Season' 679.43 3 'Full Season' 839.79 4 'Half Season' 159.39 5 'Half Season' 256.93",sep="",header=TRUE,stringsAsFactors=FALSE) upperLimit <- c(`Full Season`=779.12, `Half Season`=231.11) rejectdf <- do.call(rbind,lapply(names(upperLimit),function(x) {x1 <- subset(Prices.df,rowID==x); indx <- with(x1,cut(Price,breaks=c(-Inf,upperLimit[x],Inf),labels=FALSE)); x1[indx>1,]})) acceptdf <- do.call(rbind,lapply(names(upperLimit),function(x) {x1 <- subset(Prices.df,rowID==x); indx <- with(x1,cut(Price,breaks=c(-Inf,upperLimit[x],Inf),labels=FALSE)); x1[indx==1,]})) A.K. On Saturday, February 15, 2014 4:36 AM, Barry King <barry.k...@qlx.com> wrote: I wish to compare prices in a dataframe to calculated upper limits and then reject (collect in a reject dataframe) those rows with prices that are above the upper limit but I am having trouble aligning the variable value in the Prices dataframe with the names in the upper limit file. > upperLimit Full Season Half Season 779.12 231.11 > Prices.df rowID Price 1 Full Season 417.95 2 Full Season 679.43 3 Full Season 839.79 4 Half Season 159.39 5 Half Season 256.93 Any assistance you can provide is greatly appreciated. Barry King [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.