You do have missing values. Setting xlim does not subset the data. How about
######## link <- "http://processtrends.com/files/RClimate_CTS_latest.csv"; cts <- read.csv(link, header = TRUE) scts <- subset(cts, !is.na(GISS) & !is.na(cts)) ## remove defectives plot(GISS ~ yr_frac, scts, type = "l", xlim = c(1982, 1983), xaxs = "i", yaxs = "i") points(GISS ~ yr_frac, scts, type = "p", col = "red") ######## ? Bill Venables -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of D Kelly O'Day Sent: Friday, 21 January 2011 11:12 AM To: r-help@r-project.org Subject: [R] Unexpected Gap in simple line plot I am getting an unexpected gap in a simple plot of monthly data series. I have created a csv file of monthly climate observations that I store on-line. When I download the csv file and plot one of the series, I get a gap even though there is data for the missing point. Here is a snippet to show the problem. ## Strange plot results link <- "http://processtrends.com/files/RClimate_CTS_latest.csv"; cts <- read.csv(link, header=T) ## Simple line plot - gap for no reason plot(cts$yr_frac, cts$GISS, type="l", xlim=c(1982, 1983),xaxs="i", yaxs="i") ## May, 1982 observation missing ## Add points to plot in red, to see if May shows up points(cts$yr_frac, cts$GISS, type="p", col="red") ## yes, May shows up in points ## Look at cts data.frame. No obvious problems to me?? small <- subset(cts, cts$yr_frac >1982 & cts$yr_frac <1983) small[,c(1,3)] The same problem occurs in the other data vectors (HAD, NOAA, RSS, UAH, etc) I have not been able to figure why I am getting the gap and how to show a continuous line through May, 1982 data points. Any suggestions? D Kelly O'Day http://chartsgraphs.worpress.com http://chartsgraphs.wordprss.com -- View this message in context: http://r.789695.n4.nabble.com/Unexpected-Gap-in-simple-line-plot-tp3228853p3228853.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.
