A reproducible example and the basis system information requested
in the posting guide would be very helpful.
OS, version of R, versions of the relevant packages...
We really do need this information to answer questions.
Sarah
On Thu, Dec 1, 2011 at 9:45 AM, Matilde Karakachoff <kar...@ifc.cnr.it> wrote:
> Ok, I’m sorry. I think that there was a little problem with my previous
> message.
>
> I’m trying to execute some R commands on a linux server (where I installed R
> and packages previously) to create a SpatialGridDataFrame. It has to be a
> grid 10*10 to which I will associate data resulting from simulations of the
> spatial distribution of genotypic data (Fregene).
>
>
> Some lines and columns of my data frame:
> coord x y f.all1s1 f.all2s1
> 4040 40 40 0,665 0,335 0,05346675
> 4041 40 41 0,72 0,28 0,049152
> 4042 40 42 0,825 0,175 0,04141875
> 4043 40 43 0,81 0,19 0,042483
> 4044 40 44 0,82 0,18 0,041772
> 4045 40 45 0,59 0,41 0,059643
> 4046 40 46 0,585 0,415 0,06006675
> 4047 40 47 0,405 0,595 0,07632075
>
> My script:
>>
>> library(spdep)
>> Locus1 <- read.csv2(file='data.csv', head=T)
>> coordinates(Locus1) <- c('x', 'y')
>> Locus1.sp <- as(Locus1, 'SpatialPixels')
>> Locus1.gr <- as(Locus1.sp, 'SpatialGridDataFrame')
>
>
> The first four lines are ok, but the last one gives the following error:
>
> Error in asMethod(object, Class, value) : replace-coercion not allowed
>
> But if I run it on my computer it works. So, why it doesn’t work on a
> server? May be the ‘spdep’ package doesn't work in the same way on linux?
> Thanks a lot,
>
> Matilde
>
>
--
Sarah Goslee
http://www.functionaldiversity.org
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