[R] plot by cathegories within a factor

[Ivan Calandra]

Hi,

The best I've found (but definitely not the best!):

x <- read.table(textConnection("Group Ind Age Trait
1 1 2 21
1 2 1 22
1 2 2 21
1 3 1 24
1 3 2 45
1 4 1 23
1 4 2 26
2 1 1 45
2 1 2 12
2 2 1 25
2 2 2 26
2 3 1 45
2 3 2 43
2 4 1 23
2 4 2 47
"), header=T)

str(x)
'data.frame':   15 obs. of  4 variables:
  $ Group: int  1 1 1 1 1 1 1 2 2 2 ...
  $ Ind  : int  1 2 2 3 3 4 4 1 1 2 ...
  $ Age  : int  2 1 2 1 2 1 2 1 2 1 ...
  $ Trait: int  21 22 21 24 45 23 26 45 12 25 ...

x_grp <- split(x, x$Group)

for (i in 1:length(x_grp)){
  plot(x_grp[[i]]$Trait~x_grp[[i]]$Age)
}

There are probably better approaches using lattice.

HTH,
Ivan


Le 10/27/2010 11:21, Rosario Garcia Gil a écrit :
> Hello
>
> I have a data set summarized like this:
>
> File name= Height
>
> Group Ind Age Trait
> 1     1	1	20
> 1	1	2	21
> 1	2	1	22
> 1	2	2	21
> 1	3	1	24
> 1	3	2	45
> 1	4	1	23
> 1	4	2	26
> 2	1	1	45
> 2	1	2	12
> 2	2	1	25
> 2	2	2	26
> 2	3	1	45
> 2	3	2	43
> 2	4	1	23
> 2	4	2	47
> .
> .
> .
>
>
> I would like to plot Trait ~ Age but a different plot for each Group.
> I tried:
>> plot(Height$Trait ~ Height$Age | Group)
> But does not work. Any suggestion?
>
> Thanks
> Rosario
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php