Displaying 20 results from an estimated 147 matches for "geor".
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2006 Mar 17
3
can't load "geoR"
Dear R list,
I've just installed R and then followed the instructions to install the
package "geoR" from within R by using the following line of code:
install.packages("geoR", contriburl = "http://www.est.ufpr.br/geoR/windows")
This installed okay under the folder C:\documents and settings\ ...
But when I follow the instructions in the illustrative session for geoR, I...
2005 Dec 13
1
bug in geoR (?)
I've enconuntered this problem with the last cran version of geoR:
> library(geoR)
> day <- rep(1:2, each=5)
> coords <- matrix(rep(runif(10),2), 10, 2)
> data <- rnorm(10)
> data[1] <- NA
> as.geodata(cbind(coords, data, day), realisations=4)
as.geodata: 1 points removed due to NA in the data
Errore in as.geodata(cbind(coords, data...
2006 Jan 05
1
Memory limitation in GeoR - Windows or R?
...not a tool maker (actually an ecologist
doing some biostatistics)... so, I take the liberty of sending a copy of
this e-mail to the r-help list where capable computer persons and true
statisticians may provide more relevant information and also to Paulo
Ribeiro and Peter Diggle, the authors of geoR..
I really feel that your huge matrix cannot be handled in R that easy,
and I get the same kind of error as you:
> m=matrix(1,ncol=18227, nrow=18227)
Error: cannot allocate vector of size 2595496 Kb
In addition: Warning messages:
1: Reached total allocation of 511Mb: see help(memory.size)
2:...
2003 Sep 10
1
geoR variogram problem
Dear GeoR-er,
If I use the variog function in the latest release of geoR, the first lag is
always ignored.
For instance, if you read in geodata, calculates the variogram using the
variog function and give in a uvec like uvec=seq(0,max,by=2.44), it only
starts giving results from distance=4.88 and ignores 2....
2008 Aug 15
1
Strange error message from geoR´s likfit () lik. max. func.
ComRades:
I am geeting the error message
Error in ldots[[which(MET)]] : attempt to select less than one element
when I try to fit the geostatistical model with the likfit() function of
geoR.
I have tried with old data for which likfit() successfully maximised the
likelihood in previous versions of geoR, and yet the current version
fails.
I have tried in Windows Vista and Windows XP (I haven't tried in Linux
systems) and the problem occurs in both systems.
Below I show the issue wi...
2003 Jul 24
1
geoR size limit problem
Hi all,
I tried to produce some kriged surfaces with geoR (latest version). The size
of the grid should be around 900 x 650 cells (what I find is not a very big
grid), and the number of points is around 2500. The command krige.conv
stopped after arround 5 min saying it can not allocate a vector with around
1.5 billion units. Sounds reasonable.
Is the...
2003 Feb 11
2
geoR question from new R user
Hi,
I'm a new R user. My goal is to do a variogram using geoR.
I started by trying to do the example in the geoR Illustrative Session
using my own data.
I am able to read in my Ascii data using: D <- matrix(scan("file.dat",
n=530*3), 530,3, byrow=TRUE).
Then I use: as.geodata(D, coords.col=1:2, data.col=3) to make the
object D geodata.
I ch...
2006 Oct 03
1
loaded or not?
Dear all,
Sorry for such basic question, but. when R "says":
library(Rcitrus)
Loading required package: geoR
Loading required package: sp
-------------------------------------------------------------
Analysis of geostatistical data
For an Introduction to geoR go to http://www.est.ufpr.br/geoR
geoR version 1.6-8 (built on 2006/06/29) is now loaded
-----------------------------------------------------...
2008 Aug 18
1
GeoR model.control - defining covariates at prediction locations
Hi,
Im using geoR and I'm trying to do some predictions, based on an external
trend.
I'm having some problems specifying my model.control, specifically how do I
define my model, and also the source of the covariate data at the prediction
locations?
I am assuming that the covariate data at the prediction lo...
2003 Sep 30
2
non-linear trends in kriging model
Hi
I am struggling to fit a non-linear trend using the
likfit function in geoR.
Specifically I want a sigmoidal function, something
like SSfpl in the nls package to fit the trend. But
it seems trend.spatial in geoR only works with lm or
glm type models.
Any ideas how I can specify the model to calculate the
kriging parameters using REML, including the
parameters of a sigmo...
2010 Aug 04
1
geoR - likfit failure
Hi
I'm using geoR package to perform linear spatial interpolation(OK).
The function likfit() fails to compute REML.
The error meassage is : Error in solve.default(v$varcov, xmat);
How I can find out that likfit() is failed to process and retrieving the error message ?
Thank you so much for your help.
2010 Jan 07
1
kriging with geoR package
Hi all,
I have to draw a map of microorganisms repartition in a sample. I use the
"image" function of geoR package to build the map but there are three
problems:
1) the legend is Horizontal (with or without vert.leg=TRUE)
2) I want to plot the position of organisms and level curves of density on
the map but I don't find the script to insert these data on the map.
3)the grey range are not really rep...
2004 Mar 24
2
geoR - help for bayesian modelling
Hi,
I am trying to do a bayesian prediction for soil pollution data above
a certain threshold, using geoR.
Everything is working fine until i am doing the krig.bayes. I tried to
do the prediction on a grid 67 by 113 cells and my computer is
freezing to death. At larger numbers of cells it tells me after a while
that it reaches the max. memory of 511 Mb. My computer has only
512 Mb of RAM. What RA...
2011 Mar 25
1
spatial stats - geoR - variogram - standard deviation
Hello,
I am attempting to get the standard deviation in multiple distance bins in
my spatial data.
It appears as though the 'variog' command in the geoR package will do the
trick, as one of the outputs from 'variog' is 'variog$sd', which,
according to the manual, is the "standard deviation of the values in each
bin".
However, when I run this command, the standard deviation values are much
larger than I would expect....
2003 Mar 25
1
geoR vector length error
Dear,
we have a problem with geoR. We try to read an ASCII table (x,y,z) with 40000
lines. With read.geodata we get the error:
Error in vector("double", length) : cannot allocate vector of length 799980000
We can read the file without any problem with read.table, but trying to
convert it to the geodata class gets the...
2004 Jan 08
1
Using geoR krige.conv
Hi,
I'm using the function krige.conv from package geoR but I'm getting a
warning that I do not understand:
Warning messages:
1: NaNs produced in: sqrt(variance)
2: NaNs produced in: sqrt(variance)
I'm performimg an ordinary kriging with a log transform (lambda=0).
Does anyone knows where this comes from ?
Thanks and regards
EJ
2010 Jun 09
0
Fixed sill in variogram fitting (geoR)
Dear all,
I'm trying to fit a variogram model using variofit function in geoR
package. There is an option to fix the nugget but is there anyway to force
the variogram sill to equal some defined value? I'm working with
standardized longitudinal data so the process variance is 1 and I'd like
to force the sill of the variogram to reach this value (and prevent it...
2006 Jun 02
1
geoR, plot of variog4 lines incomplete
I'm using R for Mac OSX version 1.14 (2129) and the geoR package
version 1.6-5 (the current version in the R repository). I'm running
R in OS 10.4.6 on a Mac G4 iBook (933MHz, 640 MB DDR SDRAM). I
searched the R archive and did not find a posting on this issue.
I want to use the variog and variog4 functions of geoR to
characterize the patter...
2004 Sep 16
1
geoR/variog4() not returning all directions
Mac OS 10.3.5, R 2.0.0
latest version of geoR
I have an incomplete 5 x 20 spatial array of samples (60 out of 100
possible locations) for which I would like to calculate directional
variograms using variog4(). Unfortunately, I can't get it to return all
4 directions. It returns variograms for 45, 90, and 135 degrees,
omitting 0 degree...
2010 Mar 14
3
the error in DoSimulateRF function
Hello,
I am a graduate student of University of Florida.
I am trying to run a process variation model and I am facing the following
error.
-------------------------------------------------------------
Analysis of geostatistical data
For an Introduction to geoR go to http://www.leg.ufpr.br/geoR
geoR version 1.6-27 (built on 2009-10-15) is now loaded
-------------------------------------------------------------
grf: generating grid 300 * 300 with 90000 points
grf: process with 1 covariance structure(s)
grf: nugget effect is: tausq= 0
grf: covarian...