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I have a data frame created with this code: require(reshape2) foo <- data.frame( abs( cbind(rnorm(3),rnorm(3, mean=.8),rnorm(3, mean=.9),rnorm(3, mean=1)))) qux <- data.frame( abs( cbind(rnorm(3),rnorm(3, mean=.3),rnorm(3, mean=.4),rnorm(1, mean=2)))) bar <- data.frame( abs( cbind(rnorm(3,mean=.4),rnorm(3, mean=.3),rnorm(3, mean=.9),rnorm(3, mean=1)))) colnames(foo) <- c("w","x","y","z") colnames(qux) <- c("w","x","y","z") colnames(bar) <- c("w","x","y","z") rownames(foo) <- c("n","q","r") rownames(qux) <- c("n","q","r") rownames(bar) <- c("n","q","r") foo <- cbind(ID=rownames(foo),foo) bar <- cbind(ID=rownames(bar),qux) qux <- cbind(ID=rownames(bar),qux) foo$fn <- "foo" qux$fn <- "qux" bar$fn <- "bar" alldf<-rbind(foo,qux,bar) alldf.m <- melt(alldf) What I want to do is to create a ggplot line curve in facet format, so it creates a graph like this: The actual graph does not contain upward lines - this is just a sketch so that the line separation is clear. My current code doesn't work: library(ggplot2) p <- ggplot(data=alldf.m, aes(x=variable)) + geom_line(aes(colour=ID),alpha=0.4) p <- p + facet_wrap( ~ fn) p What's the best way to do it?

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