Displaying 20 results from an estimated 2000 matches similar to: "Work with sgeostat library!"
2000 Aug 11
1
Problems in the new version with sgeostat library?
Hello, R-users!
When I load the sgeostat library I obtain some warnings messages.
>library(sgeostat)
What kind of problem will I expect to have with these messages?
Loading required package: mva
Loading required package: tripack
Warning messages:
1: `provide' is deprecated.
See ?Deprecated. in: .Deprecated()
2: `provide' is deprecated.
See ?Deprecated. in: .Deprecated()
Thank you
2001 Oct 18
1
Sgeostat module
Dear Users,
I use Sgeostat to calculate co variogram (function est.variogram with two
variables).
If i inverse the 2 variables in the functions, the co variogram change!
Normaly it is symmetric, isn't it?
Someone could me explain why, or give me an idea to calculate co variogram
in a easy way...
Thanks in advance
Laurent
ps : sorry for my english
Laurent William Dubroca
Centre de
2003 Jan 17
3
kriging in R
Hi, all,
Have anyone used kringing included in R? How is it?
Does it handle anisotropy data well?
How does it compare with Kriging in Arc/Info? or other geostatistics
software customized to do kriging or other geostatistics functions?
I tried Easykriging, a geostatistics tool developed for Matlab. It has
very nice GUI, but it does not provide library which i can call in my programs.
so it is
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
2004 Oct 25
1
sample variogram construction
Hi
Im attempting to build a sample variogram for 300 obersvations
of longitudinal data. So what I need to do is compute the half
squared differences between pairs of residuals (for instance
if a subject has 4 obersvations, this is 4 choose 2 paird differences)
for each subject.
Also, then I need the corresponding time differences within each
individual. So the end result will be a 300 by 2
2008 Aug 05
4
LIDAR Problem in R (THANKS for HELP)
Hi All,
I am a PhD student in forestry science and I am working with LiDAR data set
(huge data set). I am a brand-new in R and geostatistic (SORRY, my
background it?s in forestry) but I wish improve my skill for improve myself.
I wish to develop a methodology to processing a large data-set of points
(typical in LiDAR) but there is a problem with memory. I had created a
subsample data-base but
2000 Oct 20
1
Covariace or variogram surface
Hi
I'm interested in doing a anisotropy analysis of some spatial data and I
want to do a contour plot of a covariance or variogram surface to
visualize the directions of maximal and minimal anisotropy.
I know how to do a contour plot :-) but how can I obtain the variogram
surface having a geoeas format dataset (X, Y, Z) ?
Thanks
EJ
2001 Feb 28
1
re: Spatial stats: R vs. Splus
Hello,
Could someone tell me whether the spatial statistics module of
Splus is worth the rather high price, or whether one could (with
reasonable effort) carry out the same things using R and some of
its contributed packages.
Although we do have Splus (Windows and Unix), we definitely prefer
to use R whenever feasible (both for research and teaching).
Thanks for developing a superb
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 2.44!
This wasn't the case in former versions of geoR. Is this done on purpose?
Why?
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 degrees (pi/4, pi/2, 3pi/4, omitting 0). If I specify 0
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.
2005 Feb 01
2
sgeostat
Hi, list,
I am using 'sgeostat' package by Albrecht Gebhardt and I am trying to put a
correlation coefficient of some kind on the lagplots. Is there a possiblity
to do so?
Thanks
Mahdi
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E-mail: m_osm at gmx.net
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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
2002 Jan 15
0
errors intalling splancs and sgeostat
I installed R-1.4.0 and then updated all the packages I have, using
update.packages(). I got an error for splancs and sgeostat. Trying to
install them 'manually' with R CMD INSTALL, I got the following
errors.
1) for splancs:
Tue<15:26>library[82]#R CMD INSTALL splancs_2.01-5.tar.gz
Installing *source* package `splancs' ...
libs
f95 -PIC -xO5 -dalign -xlic_lib=sunperf -c
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
2005 Jun 24
2
definition of variogram
hello
I need basic explanation of variogram
and how to use in R.
I will appreciate if you supply them.
regards
Ahmet Temiz
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2001 Nov 21
2
contour as a generic function?
After "image" and "persp" would it be interesting to als have contour as a
generic function?
Cheers
Paulo Justiniano Ribeiro Jr
Dept Maths & Stats - Fylde College
Lancaster University
Lancaster LA1 4YF - U.K.
e-mail: Paulo.Ribeiro@est.ufpr.br
http://www.maths.lancs.ac.uk/~ribeiro
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2003 Jan 08
1
try.Silent
In an email to the help list John Chambers
wrote about the function helpSilent which is in the methods package,
pointing out that there is no restrictive reason to be in this package.
I did not know about this function and just incorporate it in several
functions of the geoR package where a much less elegant solution was
being used.
I guess other packages could use it as well.
Therefore,
2005 Jul 13
0
Memory question
One way I do this is to use Luke Tierney's "active bindings". I make an
active binding of a name to a function which either loads or saves the
object. Then the name behaves like the R object it's replacing. This works
nicely as long as I don't need lots of random accesses to the matrix.
I'd be happy to send the functions I use to do this.
Reid Huntsinger
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