[R] two plots on the same axis

baptiste auguie baptiste.auguie at googlemail.com
Wed Oct 7 10:38:34 CEST 2009


Your two data sets have a different year so I'm not sure what you want
to do with the x axis.

The code below plots both data sets on the same graph, with a range of
two years,

d1 <- read.table("~/Downloads/2005.txt")
d2 <- read.table("~/Downloads/2006.txt")

cleanup <- function(d){
  names(d) <- c("year", "month", "day", "value")
  transform(d, date=as.Date(paste("0", year, month, day, sep=""), "%y%m%d"))

d1 <- cleanup(d1)
d2 <- cleanup(d2)

d <- rbind(d1, d2)
d <- transform(d, year=factor(year))

with(d, plot(date,value))

# prettier with ggplot2
qplot(date, value, data=d, colour=year)



2009/10/7 ogbos okike <ogbos.okike at gmail.com>:
> Good morning. I wish to plot two data on the same axis. I tried plot(x,y,
> type = "l") for the first and tried to use lines or points(x,y, lty = 2, col
> = 4) to add or plot the second data on alongside the first. However, what I
> got was not encouraging.
> I have attached the two data and would be pleased if anybody could be of
> help.
> Thank you
> Best regards
> Ogbos
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