Displaying 20 results from an estimated 31 matches for "krigging".
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kriging
2005 Jul 19
1
problem in Krig function of "Fields" package
hello
I try to build DEM using Krig function of fields package.
And I get this error message.
here is the procedure I followed:
> dt<-read.table("/usr/local/bartin/stat/topostat1",header=F,sep="|")
> names(dt) <-c("x","y","z")
> coord<-cbind(dt$x,dt$y)
> elevation<-cbind(dt$z)
>
2002 May 16
1
Tps
Hi,
I have a 4 column file (long/lat/elev/variable) and I tried to fit the
values of my variable to the XYZ space using Tps and I keep getting the
following message:
Warning messages:
1: GCV search gives a minumum at the endpoints of the grid search in:
Krig.find.gcvmin(info, lambda.grid, gcv.grid$GCV, Krig.fgcv,
2: GCV search gives a minumum at the endpoints of the grid search in:
2004 Mar 04
0
Extracting Krig results
I'm new at this, so please bear with me.
I am trying to get Krig (actually tps) results into a data frame at a
set of points.
Frankly, all I really need is to query the Krig on a specific XY pair
and return a result. I can carry the rest. I am using tps from the
fields package.
Here's the code I use to create the Krig object:
=========== Snip! ===============================
dCurr
2005 Jun 09
1
krig.image help
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Mike J Smith
> Sent: 09 June 2005 09:58
> To: r-help at stat.math.ethz.ch
> Subject: [R] krig.image help
>
>
> Hi
>
> I have recently been experimenting with the use of kriging, primarily
> through Goldensoftware's Surfer.
2003 Jun 14
4
problem installing packages from source on win2k
Dear R-helpers,
I'm having trouble compiling R packages from source on Win2K. I installed R 1.7.1beta [1] on my win2k machine [2], downloaded the fields package as source [3] and tried but failed to install the package [4]. I get the same problem with other packages, so it doesn't appear to be limited to fields. Installation of precompiled packages seems to work fine. I've been
2009 Jan 29
0
assign point values as labels in spplot
In the code to follow, I'm trying to label points with their corresponding
values but have been unsuccessful after many variations to the following
code. The code below creates the plot I want, I simply cannot get the black
points ("+") to display the actual value. I'm guessing the problem is
somewhere in the second to last line of code (starts with "pts<-..."). I
2007 Oct 06
1
problem installing fields package 3.5 on R 1.8.1 on linux
I am returning to using R after a little time away.
Saw some great new functions in the fields package and decided to upgrade.
Everything seems to go fine until I tried to actually load the package, when
I get an error:
>library(fields)
Error in parse(file, n, text, prompt) : syntax error on line 227
And (of course) I am unable to access any of the functions in the fields
package.
Below is
2002 Jul 11
0
missing links in GRASS package for R
Dear list,
I get the following error message when installing the package GRASS.
missing link(s): interp.new
missing link(s): vgram Krig predict.Krig predict.se.Krig
See also below for the full installation message.
What does this mean exactly?
Regards, Ulrich
------------------------------------------------------------------
> R CMD INSTALL
2007 Apr 08
1
How do I back transforme ordinary log-krigged prdiction values?
I have a question to everybody.
After log10 transfprmation, I have done ordinary kriging in gstat in R? I
need to back trnasform the prediction values to orgiginal scale. How do I
do this in gstat in R?
Thanks
Zia
--
Zia Uddin Ahmed
915 Brad Field Hall
Department of Crop and Soil
Cornell University
Ithaca NY 14850
USA
2005 Jan 14
0
Upgraded and authentication fails with LDAP
FreeBSD 5.2.1
Upgraded to dovecot 0.99.12.1
After authentication failed, I also upgraded OpenLDAP
to 2.2.19
Dovecot and OpenLDAP are now the most recent versions
in the ports.
I can access the LDAP info through the OpenLDAP client
without a problem, so slapd seems to be working fine.
Both dovecot and OpenLDAP worked fine before the
upgrade. Any help will be appreciated, since several
people
2011 May 13
0
Tps error
Hi,
I am trying to use the Tps procedure to visualize 3 variables in XYZ space, but
keep getting the error messages below:
Warning messages:
1: In Krig.find.gcvmin(info, lambda.grid, gcv.grid$GCV, Krig.fgcv, :
GCV search gives a minimum at the endpoints of the
grid search
2: In Krig.find.gcvmin(info, lambda.grid, gcv.grid$GCV.one, Krig.fgcv.one, :
GCV search gives a minimum at the endpoints
2005 Dec 21
0
Help with Krige.conv using linear models
A majority of my data makes a kriged map perfectly using an exponential
model for the semivariogram to fit my data and then going through the
commands variofit() to define the model and then krige.conv() to use the
model to predict values in a grid. But?one set of my data appears to be
linearly correlated for the first 5000 meters and not correlated beyond
that. I have been having problems
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
2002 Oct 30
1
Error in Fields TPS function {svd ...} again
Thanks for all the helpful responses. I include the data file and the
syntax file for reference. Again, if I use the fields function, as is, I
get the message:
Error in svd(tempM) : error 159 in dsvdc
using traceback, I get:
> traceback()
4: stop(paste("error ", z$info, " in dsvdc"))
3: svd(tempM)
2: Krig(x, Y, cov.function = rad.cov, m = m, decomp = decomp,
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.
2002 Mar 27
1
kriging C/C++ code
Hello to everybody !
I don't have a question directly connected with R, but it takes starting
point from the use of the R function Krig for kriging interpolation and
from the idea of making a different implemetation of the function for my
purposes.
Doas anyone know where can I find free C or C++ codes of kriging ?
As always, thanks a lot in advance,
Paola.
2005 Dec 29
1
Help with Kriging
R Experts,
I'm looking for some help with the geoR package. I'm trying to krig
some data without using a global neighborhood. I would like to set my
moving neighborhood to a distance, say 100 meters, where I know my data
is spatially correlated. I have tried the ksline function, but that
only allows my moving neighborhood to be set to a number of data points.
But, since my data
2007 Dec 04
1
2/3d interpolation from a regular grid to another regular grid
...0,3), ylim=c(0,3), col="blue", pch=19)
I would like to interpolate the quantities on grid1 (red) and grid2
(blue) on the same grid (black). This scenario is very common in
geophysical data and models. I only found:
- functions in package akima which are designed for irregular grids
- krigging in package fields, which also requires irregular spaced data
- approx or spline which works in 1D and which I could apply line by
line and column by column and use a mean of both estimates
I am sure there are plenty of functions already available to do this
but searching R-help and the packages...
2009 Oct 06
0
Interpolation
Hi R community
I need to interpolate precipitation data for a natural park. I have precipitation data from some climate stationts. (I know the table is not complete but I only need to show you X,Y, Altitude and PrepJul)
X
Y
Altitude
PrepJan
PrepFeb
PrepMar
PrepAp
PrepMay
PrepJun
PrepJul
597706
4093438
41
0
9
77,8
63,1
17,5
0
2,6
597535
2010 Nov 22
1
What if geoRglm results showed that a non-spacial model fits?
Hi R-people:
Working in geoRglm, it shows me, according to AIC criterion, that the non-spacial model describes the process in a better way. It's the first time that I'm facing up to.
These are my results:
OP2003Seppos.AICnonsp-OP2003Seppos.AICsp
#[1] -4
(OP2003Seppos.lf0.p<-exp(OP2003Seppos.lf0$beta)/(1+exp(OP2003Seppos.lf0$beta))) #P non spatial
#[1] 0.9717596