[R] Scatter plot - using colour to group points?
sarah.g10 at hotmail.co.uk
Mon Nov 21 20:17:03 CET 2011
I am very new to R - trying to teach myself it for some MSc coursework.
I am plotting temperature data for two different sites over the same time
period which I have downloaded from a university weather station data
I am using the following code to create the plot
plot ( x = TEMP3[,"TIME"], y = TEMP3[,"TEMP"], type = "p", col =
TEMP3[,"SITE"], pch = 3, main = "Temperature changes", xlab = "Date", ylab =
I managed to use col = TEMP3["SITE"] to plot the two different sites( BG1
and EA7) in different colours, but I am struggling to change the colours.
I wanted to up a colour scheme to match the site, so tried
BG1 <- "blue"
EA7 <- "green"
before the plot function, but the graphic just came out with red and black
There are other datasets in which there are more than two sites so I would
really like to learn how to use colour to distinguish between them on a
Any direction would be very greatly received!
Thank you very much
View this message in context: http://r.789695.n4.nabble.com/Scatter-plot-using-colour-to-group-points-tp4092794p4092794.html
Sent from the R help mailing list archive at Nabble.com.
More information about the R-help