Displaying 3 results from an estimated 3 matches for "covariogram".
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2002 Apr 03
3
non-stationary covariance
Hi !
Sorry for my ignorance. I have two questions:
1) which is in R the function to make a covariogram of spatial data ?
2) does anyone know if there exist the possibility in R of performing
kriging with an arbitrary covariance function ?
If I have well understood the Krig procedure offers only three
possibilities (expcov, gauscov and sphercov) that are the common models
for stationary and isotrop...
2005 Jul 04
1
eigen of a real pd symmetric matrix gives NaNs in $vector (PR#7987)
Full_Name: cajo ter Braak
Version: 2.1.1
OS: Windows
Submission from: (NULL) (137.224.10.105)
# I would like to attach the matrix C in the Rdata file; it is 50x50 and comes
from a geostatistical problem (spherical covariogram)
> rm(list=ls(all=TRUE))
> load(file= "test.eigen.Rdata")
> ls()
[1] "C" "eW"
>
> sym.check = max(abs(C - t(C))) # should be 0 for symmetry
> sym.check
[1] 0
> eW <-eigen(C, symmetric = TRUE)
> l_eW <- eW$values
> print(eW$values)...
2005 Jul 04
0
eigen of a real pd symmetric matrix gives NaNs in $vector (PR#7989)
...ow) on 2003-12-01.
cajo.terbraak at wur.nl wrote:
>Full_Name: cajo ter Braak
>Version: 2.1.1
>OS: Windows
>Submission from: (NULL) (137.224.10.105)
>
>
># I would like to attach the matrix C in the Rdata file; it is 50x50 and comes
>from a geostatistical problem (spherical covariogram)
>
>
>
>>rm(list=ls(all=TRUE))
>>load(file= "test.eigen.Rdata")
>>ls()
>>
>>
>[1] "C" "eW"
>
>
>>sym.check = max(abs(C - t(C))) # should be 0 for symmetry
>>sym.check
>>
>>
>[1]...