Displaying 20 results from an estimated 3000 matches similar to: "Are package maintainers responsible for name-mangling class names?"
2004 Jun 16
0
gstat 0.9-12: cokriging cross validation and class name incompatibilities
I uploaded gstat 0.9-12 to CRAN, which has a few important changes:
1. Cokriging cross validation
Cokriging cross validation is now possible with the function gstat.cv:
you simply pass a multivariable gstat object, and cross validation is done
for the first variable in the object. Optionally, secondary variable
records
at locations coinciding with the validation locations are removed.
2. Class
2004 Jun 16
0
gstat 0.9-12: cokriging cross validation and class name incompatibilities
I uploaded gstat 0.9-12 to CRAN, which has a few important changes:
1. Cokriging cross validation
Cokriging cross validation is now possible with the function gstat.cv:
you simply pass a multivariable gstat object, and cross validation is done
for the first variable in the object. Optionally, secondary variable
records
at locations coinciding with the validation locations are removed.
2. Class
2003 Mar 07
1
REML option in gstat
Hi, please help!!
I've been trying to fit variogram models using the REML method in the gstat
package. Every time the Windows GUI crashes. For example
library(gstat)
data(meuse)
x <- variogram(zinc ~ 1, ~x + y, meuse)
v <- vgm(140000, "Sph", 800, nug = 10000)
plot(x, model = fit.variogram(x, model = v, fit.method=5))
Other fit methods are non problematic (eg. fit.method=7
2006 Jan 10
0
new gstat version
Soon on CRAN a new version of package gstat will emerge, which
has a few minor changes and possible incompatibilities w.r.t. the
previous version(s).
The new gstat (0.9-23) now:
+ depends on sp, and uses internally with Spatial* classes from sp
if data are provided in the old-fashoned way (as data.frame)
+ has a vignette to get you started with the classes in sp
+ defines krige as a generic;
2006 Jan 10
0
new gstat version
Soon on CRAN a new version of package gstat will emerge, which
has a few minor changes and possible incompatibilities w.r.t. the
previous version(s).
The new gstat (0.9-23) now:
+ depends on sp, and uses internally with Spatial* classes from sp
if data are provided in the old-fashoned way (as data.frame)
+ has a vignette to get you started with the classes in sp
+ defines krige as a generic;
2006 Jun 03
1
default value for cutoff in gstat variogram()
I wonder what is the default value for the argument 'cutoff' when not
specified in the variogram.formula function of gstat. Computing
variogram envelops within gstat, I am comparing the results obtained
with variog in geoR and variogram in gstat, and it took me a while
before understanding that the cutoff default value is not the maximum
distance.
Can Edzer tell us about it?
All the
2006 Nov 24
2
plot() and Jpeg() increase font size and resolution
Dear list,
I am having troubles increasing the fontize when plotting a
variogram{gstat} and its model (vgm) with plot and using jpeg(). Also
the resolution in the jpeg call does not work. I am using R2.4 on
Mandriva 10.2 linux.
I can change fontsize with cex.axis in a normal plot, so I presume it
has to do with plotting the variogram model. Any help on how to increase
the font size and
2007 Jan 05
1
gstat package. "singular" attibute
Hello,
I'm using the gstat package within R for an automated procedure that
uses ordinary kriging.
I can see that there is a logical ("singular") atrtibute of some
adjusted model semivariograms:
.- attr(*, "singular")= logi TRUE
I cannot find documentation about the exact meaning and the implications
of this attribute, and I dont know anything about the inner calculations
2005 Nov 09
2
Variograms and large distances
Hello R list,
I need to compute empirical variograms using data from a large
geographic area (~10^6 km2). Although I could not find a specific
reference, I assume that both geoR and gstat calculate distances among
data points assuming points are on a flat surface (using the Pythagorean
Theorem). Because the location of my data is large and located near the
pole, assuming that latitude and
2009 Mar 24
1
Variogram with Gstat
Dear all can you help me? i have this problem: i have a dataset in a text file
in a matrix of 3 columns: x, y, z where x and y are the coordinates and Z are
the mesurements. How can i do a variogram with R?
2009 Sep 08
1
gstat---2 basic plot questions
Hi all--
I'm new to R, statistics and programming, so sorry if this is a really basic
question!
I have plotted a directional variogram, and I want to
a. overlay the omni-directional line over each directional panel
b. display the directional variograms in a single panel with a legend that
associated each line to each degree measurement.
The line I'm using is
2003 Aug 17
1
(no subject)
Hi all,
>str(df)
`data.frame': 31837 obs. of 3 variables:
$ x : num 410683 410700 410720 410740 410324 ...
$ y : num 43136 43126 43123 43125 42709 ...
$ wz: num -101.1 -94.9 -93.3 -94.5 30.8 ...
>library(gstat)
>g<-gstat(id="rv",form=wz~1,loc=~x+y,data=df,model=mat,nmax=500,set=list(average=1))
>str(g)
List of 3
$ data :List of 1
..$ rv:List of 10
..
2006 Nov 27
2
[R-sig-Geo] plot() and Jpeg() increase font size and resolution
Thanks to Edzer and Roger,
I can now plot with increased font sizes. However, jpeg still does not
reproduce these, nor does it show up in high quality. What I would like
to do is produce some highresolution jpegs.
Any help would be appreciated
Thanx
Herry
R2.4 on Mandriva 10.2 linux.
Dr Alexander Herr
Spatial and statistical analyst
CSIRO, Sustainable Ecosystems
Davies Laboratory,
University
2005 Nov 08
2
Variogram
Dear All,
Is there anybody has the experience in using variogram(gstat) ? Please kindly give me some hints about the results.
I used variogram() to build a semivariogram plot as:
tr.var=variogram(Incr~1,loc=~X+Y,data=TRI2TU,width=5)
then fir the variogram to get the parameters as:
v.fit = fit.variogram(tr.var,vgm(0.5,"Exp",300,1))
v.fit
model psill range
1 Nug 1.484879
2009 Jun 10
2
plot two variograms on a same graph
Hi,
I would know how to plot two variograms on a same graph. I can plot one by one but I would draw both on the same one.
Is it possible? Do i need any special package?
Thanks!
Cordialement
Damien Landais
2006 Aug 20
3
plot problem
Hello.
I'm pretty much new to R and I'm trying to produce some figures.
It seems to me, that R has some asynchronous way of plotting figures.
When I run this code:
#constructs the semivariogram of SC1929
vgm1 <- variogram(SC1929~1,~U+V,puerto.map$att.data)
# trying to make new plot
dev.set(which=dev.next())
plot(vgm1)
title(main="Semivariogram",font.main=4)
2006 Jan 05
1
Memory limitation in GeoR - Windows or R?
Dear Aaron,
I am really a tool user and 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
2008 Apr 01
1
spatial cross-correlation
Hi;
I cannot find in the R html documentation a way to evaluate
cross-correlation in 2D data sets.
I would like to evaluate cross-correlation in a series of moving windows
between two maps.
i,e, specify several windows inside the complete 2D spatial matrixes and
for each one ofthese windows evaluate the 2D cross-correlation (commonly
conducted in the spectral domain).
Thanks in advance and best
2013 Mar 19
1
Cokriging
Dear All,
I run following code to estimate the blocks using cokriging ( my data set has more than 50,000 data points). All the things run finely but Once I run the predict.gstat function it gave the error message - "memory.c", line 58: can't allocate memory in function m_get(). I run this code on LINUX sever but result is same. Would any one please be able to give a solution for
2009 Jun 11
0
Variogram fitted by Cauchy
Hi
I'm using R(2.9.0) and gstat package under Windows to plot sample variograms.
When I want to fit them, I don't have the possibility to choose Cauchy functions. Under Mathematica for example, we have it and it seems to be the best one to fit the variograms I have
I tested the others functions, they can fit but I would,if possible, use the Cauchy one. If anybody knows something about