Displaying 20 results from an estimated 1000 matches similar to: "Variogram fitted by Cauchy"
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
2017 Sep 24
1
R version 3.3.2, Windows 10: gstat package: Error in fitting a variogram model using 'fit.variogram' function
Dear Members,
I am trying to fit a variogram model using fit.variogram function from the gstat package. The figure showing my experimental variogram can be seen here: https://i.stack.imgur.com/UZXw4.png
My code line for this operation is:
> c2.vgm.fit<-fit.variogram(c2.vgm.exp,vgm(nugget=0, psill=400,model="Exp",range =40000),fit.method = 7)
The system throws following error
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 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
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
2009 Oct 08
1
variogram
Hello everybody,
I want to run the following R-code, but it does'nt work.
> res.vgm = variogram(ertrag ~ rep, # !!!
+ loc = ~ xpos + ypos, # !!!
+ width = start.range / 10,
+ data = d)
Error in vector("double", length) : element 2 is empty;
the part of the args list of '.Internal' being evaluated was:
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
2008 Aug 07
0
3d kriging et al
R Users:
...been working with the sp and gstat packages for the past couple of days in an effort to analyze a set of ~ 200 soil samples collected from various eastings, northings, and depths and containing a wide range of measured hydrocarbon concentrations.
Thus far, I've managed to import the data, log-transform the concentrations, assign coordinates, generate and fit a variogram model and
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
2011 Feb 18
0
Variogram (nlme) of a lme object - corSpatial element question
Dear Users,
>From previous analysis (semi-variograms using package gstat), I found
spatial autocorrelation in my dataset.
The best fitted model to this spatial correlation structure is the Gaussian
model (Spherical, Exponential, Linear tested and comparison done by Sum of
Square errors).
So I used corGaus function to define this spatial autocorrelation in my lme
model using the option
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;
2015 Aug 04
2
Duda interpolación (package ' gstat ')
Hola,
# Hacemos el KED. Ver función "krige()":
KED.rad <- krige(
formula=pluvPcp~layer, # covariable -> radar
locations=lluvia.rad.pluv.spdf,
newdata=radarGrid, # podría ser cualquier objeto Spatial
model=v.fit, # modelo de semivariograma.
maxdist=Inf
2008 Oct 16
1
Suppressing error messages in a for loop
Hi,
Is there any way that I can supress error messages so that they don't stop
for loops running?
I'm using the gstat package and have created a variogram model for the
double exponential model:
"dexp <- vgm( .5, "Exp", 10,.1, add.to = vgm(.5, "Exp", 100))"
and fitted it using
"dexp.fit <- fit.variogram(temp2, dexp, fit.method=6,
2015 Aug 06
2
Duda interpolación (package ' gstat ')
Sale plano sí.
Ya se que sin tener los datos y el código es un poco difícil, pero es que mis datos ocupan mucho, es imposible.
Seguiré mirando por internet.
Muchas gracias Rubén.
Un saludo,
> To: r-help-es en r-project.org
> From: rubenfcasal en gmail.com
> Date: Thu, 6 Aug 2015 14:21:47 +0200
> Subject: Re: [R-es] Duda interpolación (package ' gstat ')
>
> Hola
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
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
2011 Nov 16
0
calculating variograms (gstat) with large data sets
Dear all,
I am aiming to calculate variograms using variogram() from gstat.
The problem is that some of my data-sets are very large (> 400000 points).
Running the command takes some hours of time and does not give any
error-message.
Nevertheless the result seem not to be appropriate - the first few bins
are ok (up to a distance of about 300) but then it gains lags which are
much larger than
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 pattern of spatial autocorrelation of tree
2006 Feb 01
1
Cauchy distribution limits
I have question (curiosity) regarding returned values of R's qcauchy
() function,
for nonexceedance probability (F). It seems the ideal returned range
of cauchy distribution should be [-Inf,Inf].
For F=0
> qcauchy(0)
[1] -Inf
but for F=1
> qcauchy(1)
[1] 8.16562e+15
It seems to me that the proper return value should be Inf???
For default (location=0,scale=1) quantile function of