Tim,
If you really want to use matplot, it's not hard. You need to
feed it a matrix of x-values and a corresponding matrix of
y-values.
id <- rep(1:5, len=100)
x <- rnorm(100,5,1)
y <- rnorm(100,20,5)
xm <- matrix(x, ncol = 5, byrow = TRUE)
ym <- matrix(y, ncol = 5, byrow = TRUE)
matplot(x, y, pch = 1)
But surely you don't need matplot:
plot(y ~ x, data = mydat, col = id)
-Peter Ehlers
Tim Clark wrote:
Henrique,
Thanks for the suggestion. I think I may not understand matplot() because the
graph did not come out like it should have. Gabor suggested:
library(lattice)
xyplot(y ~ x, mydat, groups = id)
Which gave what I was looking for. Is there a way to get matplot() to give the
same graph? I don't have to use matplot(), but would like to understand its
use.
Thanks,
Tim
Tim Clark
Department of Zoology
University of Hawaii
--- On Sun, 9/27/09, Henrique Dallazuanna <www...@gmail.com> wrote:
From: Henrique Dallazuanna <www...@gmail.com>
Subject: Re: [R] Data formatting for matplot
To: "Tim Clark" <mudiver1...@yahoo.com>
Cc: r-help@r-project.org
Date: Sunday, September 27, 2009, 4:47 PM
You can try this:
matplot(do.call(cbind, split.dat))
On Sun, Sep 27, 2009 at 11:42 PM, Tim Clark <mudiver1...@yahoo.com>
wrote:
Dear List,
I am wanting to produce a multiple line plot, and know
I can do it with matplot but can't get my data in the format
I need. I have a dataframe with three columns; individuals
ID, x, and y. I have tried split() but it gives me a list
of matrices, which is closer but not quite what I need.
For example:
id<-rep(seq(1,5,1),length.out=100)
x<-rnorm(100,5,1)
y<-rnorm(100,20,5)
mydat<-data.frame(id,x,y)
split.dat<-split(mydat[,2:3],mydat[,1])
I would appreciate your help in either how to get this
into a format acceptable to matplot or other options for
creating a multiple line plot.
Thanks,
Tim
Tim Clark
Department of Zoology
University of Hawaii
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--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
______________________________________________
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and provide commented, minimal, self-contained, reproducible code.
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
