[R] Data formatting for matplot

[Tim Clark]

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