[R-sig-Geo] error in krig interpolation

[Edzer J. Pebesma]

el1 is already a SpatialPointsDataFrame, so omit the locations argument.

You may try something as simple as

zz <- krige(log(z) ~ 1, el1, mask_SG, efitted) 

--
Edzer

temiz wrote:
> when does this error occur ?
>
>  > zz <- krige(formula = log(el1$z) ~ 1, locations = ~x+y , data = el1 
> ,newdata = mask_SG , model = efitted) Error in function (classes, fdef, 
> mtable)  :
>         unable to find an inherited method for function "coordinates<-", 
> for signature "SpatialPointsDataFrame"
>
>
> str(el1) gives:
>
> Formal class 'SpatialPointsDataFrame' [package "sp"] with 5 slots
>   ..@ data       :'data.frame': 24051 obs. of  4 variables:
>   .. ..$ cat: num [1:24051] 1 2 3 4 5 6 7 8 9 10 ...
>   .. ..$ x  : num [1:24051] 449114 449204 449262 449263 449276 ...
>   .. ..$ y  : num [1:24051] 4590406 4590375 4590117 4590304 4590214 ...
>   .. ..$ z  : num [1:24051] 110 110 110 110 110 110 110 110 110 110 ...
>   ..@ coords.nrs : num(0)
>   ..@ coords     : num [1:24051, 1:2] 449114 449204 449262 449263 449276 ...
>   .. ..- attr(*, "dimnames")=List of 2
>   .. .. ..$ : NULL
>   .. .. ..$ : chr [1:2] "coords.x1" "coords.x2"
>   ..@ bbox       : num [1:2, 1:2]  449083 4584531  456552 4591890
>   .. ..- attr(*, "dimnames")=List of 2
>   .. .. ..$ : chr [1:2] "coords.x1" "coords.x2"
>   .. .. ..$ : chr [1:2] "min" "max"
>   ..@ proj4string:Formal class 'CRS' [package "sp"] with 1 slots
>   .. .. ..@ projargs: chr " +proj=utm +zone=36 +ellps=intl +units=m 
> +no_defs"
>
>
>
> regards
>
>