[R] Code scatter plot data from matrix with 3rd column

[John Kane]

Your data is effectively unreadable. Please use dput() to supply sample data.

Here is one way to do what you want  for data frames using the ggplot2 package.

library(ggplot2)
mydata  <-  data.frame(x = 1:10, y = rnorm(10), z = c(rep(1,4), rep(2, 6)))
ggplot(mydata, aes(x, y, colour= as.factor( z))) + geom_point()


John Kane
Kingston ON Canada


> -----Original Message-----
> From: kbw1123 at yahoo.com
> Sent: Mon, 2 Jul 2012 13:31:36 -0700 (PDT)
> To: r-help at r-project.org
> Subject: [R] Code scatter plot data from matrix with 3rd column
> 
> Hello
> 
> I am looking for a simple way to plot my data from a matrix (or data
> frame) using a 3rd column as category to code the data points.
> 
> for example:
> xyz
> 543240
> 104230
> 15901
> 203241
> 25781
> 3042340
> 357891
> 405670
> 45780
> 50531
> 
> Ideally, I'd like 0 or 1 to correspond to a color but I'd settle for a
> symbol at this point.  I have tried working with pch but can't get it to
> work.
> 
> Thanks
> Kat
> 	[[alternative HTML version deleted]]
> 
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