Displaying 20 results from an estimated 200 matches similar to: "kriging problem(?)"
2007 Oct 30
2
calculate spatial distance
Hi,
I have a set of locations defined by longitude and latitude (in degrees),
and want to calculate the spatial (or geographic) distance among all
locations.
I did not find such a function in the spatial-related packages. (I *cannot*
use 'dist', as I have geographic, not cartesian coordinates).
thanks!
Robert
Robert Ptacnik
Norwegian Institute for Water Research (NIVA)
Gaustadall?en 21
2007 Nov 28
2
fit linear regression with multiple predictor and constrained intercept
Hi group,
I have this type of data
x(predictor), y(response), factor (grouping x into many groups, with 6-20
obs/group)
I want to fit a linear regression with one common intercept. 'factor'
should only modify the slopes, not the intercept. The intercept is expected
to be >0.
If I use
y~ x + factor, I get a different intercept for each factor level, but one
slope only
if I use
y~ x *
2007 Nov 29
1
relative importance of predictors
Hei Group,
I want to compare the relative importance of predictors in a multiple
linear regression y~a+bx1+cx2...
However, bptest indicates heteroskedasticity of my model. I therefore
perform a robust regression (rlm), in combination with bootstrapping (as
outlined in J. Fox, Bootstrapping Regression Models).
Now I want to compare the relative importance of my predictors. Can I rely
on the
2007 Feb 07
1
heteroscedasticity problem
Dear Listers,
I have a regression problem (x->y) with biological data, where x influences
y in two ways, (1) y increases with x and (2) the variation around the mean
(residuals) decreases with increasing x, i.e. y becomes more 'predictable'
as x increases.
The relationship is saturating, y~a + bx + cx^2, gives a very good fit.
I know basically how to test for heteroscedasticity. My
2003 Apr 03
2
Matrix eigenvectors in R and MatLab
Dear R-listers
Is there anyone who knows why I get different eigenvectors when I run
MatLab and R? I run both programs in Windows Me. Can I make R to produce
the same vectors as MatLab?
#R Matrix
PA9900<-c(11/24 ,10/53 ,0/1 ,0/1 ,29/43 ,1/24 ,27/53 ,0/1 ,0/1 ,13/43
,14/24 ,178/53 ,146/244 ,17/23 ,15/43 ,2/24 ,4/53 ,0/1 ,2/23 ,2/43 ,4/24
,58/53 ,26/244 ,0/1 ,5/43)
#R-syntax
2007 Jun 15
1
interpretation of F-statistics in GAMs
dear listers,
I use gam (from mgcv) for evaluation of shape and strength of relationships
between a response variable and several predictors.
How can I interpret the 'F' values viven in the GAM summary? Is it
appropriate to treat them in a similar manner as the T-statistics in a
linear model, i.e. larger values mean that this variable has a stronger
impact than a variable with smaller F?
2003 May 19
1
Syntax for random effect in glmmPQL
Dear R-listers
I wonder if someone can help me with the syntax for the random effect in
glmmPQL()? I have a data set with a response variable "y" (counts), two
dependent variables: "treat" (4 levels) and "site" (2 levels). The
latter, I want to use as a random variable. How do I specify this in the
function?
Is it like this:
2005 Oct 14
1
smbcacls add acl fails 3.0.20
Hi all!
I have a problem setting ACLs on a remote file on a Windows XP Pro
SP2 box.
I issue the following command:
smbcacls -a 'ACL:BBI-DEV\beakid:ALLOWED/0/0x00100116' -U 'BBI-DEV
\Admin' //BBI-DEV/Data /Niva.txt
And I get this response from debug level 3.
Password:
Connecting to host=BBI-DEV
Connecting to 192.168.1.124 at port 445
Doing spnego session setup (blob
2005 Oct 17
1
smbcacls add fails 3.0.20a
Hi all!
I have a problem setting ACLs on a remote file on a Windows XP Pro
SP2 box.
I issue the following command:
smbcacls -a 'ACL:BBI-DEV\beakid:ALLOWED/0/0x00100116' -U 'BBI-DEV
\Admin' //BBI-DEV/Data /Niva.txt
And I get this response from debug level 3.
Password:
Connecting to host=BBI-DEV
Connecting to 192.168.1.124 at port 445
Doing spnego session setup (blob
2002 Oct 14
1
Post hoc Multiple comparison
Dear R-listers
I'm a new R-user who needs some help with a test that I want to do. I
have done a field experiment: four treatments (cont, x, y and xy) at
three sites (A, B and C), the response is count data (0 - 15). I've done
a Poisson regression:
>glm(response~as.factor(treatment)*as.factor(site), family=quasipoisson,
offset(max.response), data=dat)
The "offset" is the
2005 Oct 21
3
Samba-EventLog-HOWTO
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
For those interested in some more detail of the EventLog
features in the upcoming Samba 3.0.21 release, see:
http://www.samba.org/~jerry/Samba-EventLog-HOWTO.txt
Thanks to Brian Mroan and Marcin Porwit at Centeris
for all their hard work.
cheers, jerry
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Version: GnuPG v1.4.0 (GNU/Linux)
Comment: Using GnuPG with
2017 Oct 21
2
[X86] How to query for Opcode type?
Hi,
I would like to query the X86InstrInfo tables to determine if a given
opcode is a load or store from stack. I see functions
isFrameLoadOpcode and isFrameStoreOpcode
in lib/Target/X86/X86InstrInfo.cpp that would provide the functionality I
am looking for.
However, these functions are static.
What is the recommended way to perform such queries for a MachineInstr -
short of replicating the
2009 Dec 10
1
Need help to forecasting the data of the time series .
Hi,
This is the time series data collected from 2001 to 2008 by every
month.so,there are 96 entries.I have done basic statistics.I need to find a
model fitted to forecast this data.This is the mixedpaper collection for
recycling in the campus.
13251
13754
19061
12631
17414
21350
25384
23646
20312
20740
14007
17175
13910
17191
17113
20250
35003
11975
19665
20490
20436
2012 Dec 17
1
How to make Ordinary Kriging using gstat predict?
Hi,
I am new in R and trying to implement an algorithm which makes ordinary kriging by using gstat library and the predict method.
I use the predict method as following:
First, I create an object g:
g <- gstat(id="tec", formula=TEC ~ 1, data=data) ## Create gstat object called g
And then I use this object in the predict.
p <- predict.gstat(g, model=mod, newdata=predGrid,
2003 Oct 21
1
Indicator Kriging
Hi R-Users
Is there any package in R that work Indicator Kriging?
Or somebody is working in a link between GSLIB library in
FORTRAN for R?
Thank you very much for your help.
--
2002 Oct 16
0
Ordinary and simple kriging
I'm performing ordinary and simple kriging from a set of non-negative
values:
>krige.control.sk<-krige.control(type.krige="sk",obj.model=my.variogram.model,beta=my.variogram.model$beta)
>sk<-krige.conv(cadiz.geo,data=amostragem.cadiz$dia1.std,locations=as.matrix(cadiz.polygrid[,c(1,2)]),krige=krige.control.sk)
krige.conv: model with constant mean
krige.conv: Kriging
2002 Oct 16
0
[Fwd: Ordinary and simple kriging]
Juan Zwolinski wrote:
>
> I'm performing ordinary and simple kriging from a set of non-negative
> values:
>
>
> >krige.control.sk<-krige.control(type.krige="sk",obj.model=my.variogram.model,beta=my.variogram.model$beta)
>
>
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
2013 Nov 12
0
Kriging
Hello,
I have a problem with the kriging function. I get this error:
"Error in solve.default(matrix(A, n + 1, n + 1)) :
system is computationally singular: reciprocal condition number =
5.53457e-17"
But it has worked with other data and now I don't understand why this
error.
Here is a data example and at the end the kriging function.
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.