Hi, As there is not much information like str() or the data, it is difficult to comment.
But, try this (considering your x and y are factors): x<-c("1","4","7","9","10","15") y<-c("3","5","8","6","5","14") dat1<-data.frame(x,y) str(dat1) 'data.frame': 6 obs. of 2 variables: $ x: Factor w/ 6 levels "1","10","15",..: 1 4 5 6 2 3 $ y: Factor w/ 5 levels "14","3","5","6",..: 2 3 5 4 3 1 dat2<-dat1 dat2$x<-as.numeric(as.character(dat2$x) ) is.numeric(dat2$x) #[1] TRUE dat2$y<-as.numeric(as.character(dat2$y)) is.numeric(dat2$y) #[1] TRUE #Now try plot x1<-dat2[,1] y1<-dat2[,2] plot(x1,y1) Hope this helps. A.K. ----- Original Message ----- From: sappy <robert.wittk...@gmx.de> To: r-help@r-project.org Cc: Sent: Sunday, July 29, 2012 11:18 AM Subject: [R] Simple x,y Plot Dear Community, i have read in a table with two column from a *txt-File. What i get is a data-frame wit two column. After that i allocate this 2 column to x and y. Plotting this, i obtain a picture that looks like a bar plot (something like a grid). Is that because x and y is in factor-formatted? A conversion with "asnumeric" doesnt work. I get a vector with "NA". Here is my code: daten<-read.table("C:/Users/Robert/Desktop/regen.txt", header=FALSE, colClasses=c("real","real")) x<-daten[,1] y<-daten[,2] plot(x,y) Greetings -- View this message in context: http://r.789695.n4.nabble.com/Simple-x-y-Plot-tp4638262.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.