R help - Apr 2009 - (senza oggetto)

Dear all, I have a database x,y,value imported in R with read.table:

dati<-
read.table("dati.dat")

value is a categorical data (land use) and i want to 
plot in the same colour the same land use. It is possible with R. Thanks a lot

At 11:10 16.04.2009, giuseppeform at libero.it wrote:
>Dear all, I have a database x,y,value imported in R with read.table:
>
>dati<-
>read.table("dati.dat")
>
>value is a categorical data (land use) and i want to
>plot in the same colour the same land use. It is possible with R. Thanks a
lot
>
>______________________________________________
>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.
Maybe, something like:

set.seed(726)
x <- runif(10)
y <- runif(10)
value <- sample(c('agric', 'urban', 'traffic'), 10,
replace=TRUE)
plot(x, y, col=as.numeric(as.factor((value))),
      pch=as.numeric(as.factor((value))))

Heinz

Dear all, excuse me for my simple questions: i had imported with read table a 
database with x, y,value and i must do variogram with gstat.
can someone tell me how to do it? I read the help but I could not
to obtain variogram,

Hi
I found that variogram is a function in spatial library. I tried
> ??variogram
> library(spatial)
> ?variogram
I used an example and I did not have any problem with
it.
> data(topo, package="MASS")
> topo.kr <- surf.ls(2, topo)
> variogram(topo.kr, 25)
>
I do not have gstat available but from documentation seems that there 
shall not be any problem and that there is even example how to use it.
> PLEASE do read the posting guide 
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Regards
Petr

r-help-bounces at r-project.org napsal dne 19.04.2009 17:44:39:
> Dear all, excuse me for my simple questions: i had imported with read 
table a 
> database with x, y,value and i must do variogram with gstat.
> can someone tell me how to do it? I read the help but I could not
> to obtain variogram,
> 
> ______________________________________________
> 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.