[R] memeory problem?!

[Massimo Di Stefano]

hi,
i'm trying to perform a clustering on a big dataframe the code is this:


print("load required R packages")

require(spgrass6)

require(cluster)

gmeta6 <- gmeta6()

print("read in our 7 raster files from GRASS")

x <- readFLOAT6sp(c
("er","crosc","longc","slope","profc","minic","maxic"))

print("assemble a matrix of our terrain variables")

morph <- data.frame(cbind(x$er, x$crosc, x$longc, x$slope, x$profc, x
$minic, x$maxic))

print("normailize slope by dividing my max(slope)")

morph <- data.frame(cbind(x$er, x$crosc, x$longc, x$slope/max(x
$slope), x$profc, x$minic, x$maxic))

names(morph) <- c
("er","crosc","longc","slope_n","profc","minic","maxic")

print("perform the clustering")

morph.clara <- clara(morph, k=5, stand=F)

x$morph_class <- morph.clara$clustering

print("send result back to GRASS")

rast.put6(x,"morph", zcol="morph_class")



during the step : ....perform the clustering
after a lot of time,
i've this error:




Errore in sprintf(fmt, ...) : La lunghezza della stringa eccede la  
dimensione del buffer di 8192
Inoltre: Warning messages:
1: perl = TRUE è implementato solo nei locale UTF-8
2: perl = TRUE è implementato solo nei locale UTF-8
3: perl = TRUE è implementato solo nei locale UTF-8
4: perl = TRUE è implementato solo nei locale UTF-8
5: perl = TRUE è implementato solo nei locale UTF-8
6: perl = TRUE è implementato solo nei locale UTF-8
7: perl = TRUE è implementato solo nei locale UTF-8
8: La stringa di caratteri verrà  probabilmente troncata
Esecuzione interrotta



if i try the same code on a subregion of my data, it works very fine!
but for a large region i've this error :-(

obviously i think that is a memory problem, right ?
(i'm working with a notebook PPC-1.33-512ram)
my data are  : 7 raster-map on a region of about 50X40 km at a  
resolution of 20m.
is there some wolkaround about the memory problems?

an other question is:
what is this :
Warning messages:
1: perl = TRUE è implementato solo nei locale UTF-8
2: perl = TRUE è implementato solo nei locale UTF-8
3: perl = TRUE è implementato solo nei locale UTF-8
4: perl = TRUE è implementato solo nei locale UTF-8
5: perl = TRUE è implementato solo nei locale UTF-8
6: perl = TRUE è implementato solo nei locale UTF-8
7: perl = TRUE è implementato solo nei locale UTF-8

is it about this line of the code :

morph.clara <- clara(morph, k=5, stand=F)
i have an F > false


thanks for any suggestion about,

Massimo

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[Massimo Di Stefano]

hi to all,
frustated for this error, to day i buy a 1 GB memory slot for my laptop
now it have 1,28GB instead the old 512, but i've the same error :-(
damn!damn!....how can i do?
repeat for a little area (about 20X20 km and res=20m) it work fine!
have you any suggestion?
is ther a method for look if this error depend from my ram or other....?
thanks foe any suggestion!
i need your help.
thanks.
Massimo


Il giorno 01/dic/06, alle ore 16:05, massimodisasha ha scritto:

> hi,
> i'm trying to perform a clustering on a big dataframe the code is  
> this:
>
>
> print("load required R packages")
>
> require(spgrass6)
>
> require(cluster)
>
> gmeta6 <- gmeta6()
>
> print("read in our 7 raster files from GRASS")
>
> x <- readFLOAT6sp(c
> ("er","crosc","longc","slope","profc","minic","maxic"))
>
> print("assemble a matrix of our terrain variables")
>
> morph <- data.frame(cbind(x$er, x$crosc, x$longc, x$slope, x$profc,  
> x$minic, x$maxic))
>
> print("normailize slope by dividing my max(slope)")
>
> morph <- data.frame(cbind(x$er, x$crosc, x$longc, x$slope/max(x
> $slope), x$profc, x$minic, x$maxic))
>
> names(morph) <- c
> ("er","crosc","longc","slope_n","profc","minic","maxic")
>
> print("perform the clustering")
>
> morph.clara <- clara(morph, k=5, stand=F)
>
> x$morph_class <- morph.clara$clustering
>
> print("send result back to GRASS")
>
> rast.put6(x,"morph", zcol="morph_class")
>
>
>
> during the step : ....perform the clustering
> after a lot of time,
> i've this error:
>
>
>
>
> Errore in sprintf(fmt, ...) : La lunghezza della stringa eccede la  
> dimensione del buffer di 8192
> Inoltre: Warning messages:
> 1: perl = TRUE è implementato solo nei locale UTF-8
> 2: perl = TRUE è implementato solo nei locale UTF-8
> 3: perl = TRUE è implementato solo nei locale UTF-8
> 4: perl = TRUE è implementato solo nei locale UTF-8
> 5: perl = TRUE è implementato solo nei locale UTF-8
> 6: perl = TRUE è implementato solo nei locale UTF-8
> 7: perl = TRUE è implementato solo nei locale UTF-8
> 8: La stringa di caratteri verrà  probabilmente troncata
> Esecuzione interrotta
>
>
>
> if i try the same code on a subregion of my data, it works very fine!
> but for a large region i've this error :-(
>
> obviously i think that is a memory problem, right ?
> (i'm working with a notebook PPC-1.33-512ram)
> my data are  : 7 raster-map on a region of about 50X40 km at a  
> resolution of 20m.
> is there some wolkaround about the memory problems?
>
> an other question is:
> what is this :
> Warning messages:
> 1: perl = TRUE è implementato solo nei locale UTF-8
> 2: perl = TRUE è implementato solo nei locale UTF-8
> 3: perl = TRUE è implementato solo nei locale UTF-8
> 4: perl = TRUE è implementato solo nei locale UTF-8
> 5: perl = TRUE è implementato solo nei locale UTF-8
> 6: perl = TRUE è implementato solo nei locale UTF-8
> 7: perl = TRUE è implementato solo nei locale UTF-8
>
> is it about this line of the code :
>
> morph.clara <- clara(morph, k=5, stand=F)
> i have an F > false
>
>
> thanks for any suggestion about,
>
> Massimo

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______________________________________________
[hidden email] 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.