Displaying 20 results from an estimated 5000 matches similar to: "Moran's I- Ordinal Logistic Regression"
2010 Jun 21
0
how to find observed Moran's I value using moran.test(spdep)
Dear ,
This is Elaine.
I am computing moran's I using moran.test for
a generalized linear model (multiregression).
The following contents are the results, and I cannot find the observed
Moran's I mentioned as estimate in the manual.
Please kindly help indicate if there is observed Moran's I did not notice or
other method for calculation.
Thanks
Elaine
data: residuals(modg1)
2011 Jan 19
0
Error Moran's test : reconsider test arguments
Dear
R-users,
I was
wondering if someone could give me some advices on the following problem.
I tried to
apply moran’s test to a small dataset and couldn’t succeed, here is the error
message:
mor <- moran.test(x, res2)
Avis dans
moran.test(x, res2) :
Out-of-range p-value: reconsider test arguments
mor
Moran's I test under randomization
data: x
weights: res2
2008 Apr 18
1
spdep question - Moran's I
Dear all,
I would like to calculate a Moran's I statistic using the moran function in the spdep package. The problem I'm having deals with how to create the listw object.
My data stems from the area of social network analysis. I have list of poeple and for each pair of them I have a measure of their relationship strength. So my dataset looks like: Jim; Bob; 0.5
This measure of
2007 Feb 06
2
How to do "moran's I test"?
I want to do "moran's I test" in R language. I try to use "gearymoran" in
Package "ade4","moran" in Package "spdep", and Moran.I in Package "ape". But
I do not know how to do it because data format is different.
My data:
x y dbh
111.03 10.7 7
118.11 0.28 1.2
165.36 0.36 8.4
2012 Jul 12
0
How to handle NA-values in raster-based Geary´s C test?
Hi,
I have a question on testing spatial autocorrelation on raster data
including NA-values. In particular, I like to calculate Moran?s I and
Geary?s C indices by using inverse distance weighting matrices.
Calculating Moran?s I with moran.test works fine, because the function
contains the option "na.action=na.pass". Unfortunately, the function
geary.test does not contain this
2005 Mar 29
0
Plot Moran's I
Hello all,
I'm a new user of R and I have used the spdep package to calculate Moran's I estimates. I used the dnearneigh() function and moran.test() function and obtained what I wanted, but now I want to plot my results with the p-values. I regrouped my results for the Moran's I like
>m=c(m1$e,m2$e...) #m1 contain the results of the moran.test for lag1
2007 Oct 26
1
Help needed on calculation of Moran's I
Hi,
I am trying to calculate Moran's I test for the residuals for a
regression equation, but I have trouble converting my coordinates into
nb format.
I have used the dnearneigh() funtion now with an arbitrarily high upper
distance to make it include all plots. However, when I do the
lm.morantest() I get a Moran's I value which is the same as the expected
value and a P-value of 1.
I
2003 Apr 14
1
How to do the significant test on Local Moran's I
Dear list:
I've tried professor Roger Bivand's spdep package
for a while, and found it is quite useful. However,
when considering the significance test of the local
moran's index under the assumption of both normality
and randomization, I just can't get a clue from the
package's calculating results. I also read professor
Luc Anselin's 1995 LISA paper (geographical
2012 Dec 19
1
Using PCNM() in Vegan and calculating Moran's I
Hello-
I am using the vegan package PCMN() because I need to use option of row
weights (I am using CCA following the selection of the significant/positive
PCNM variables). In the library PCNM (PCNM function), the Moran's I is
calculated for you as part of the function. I see that I need to calculate
Moran's I separately in order to retain the eigenfunctions with positive
spatial
2003 Jul 01
0
RE: question about spatial correlation with Xs and Ys
-----Original Message-----
From: r-help-request at stat.math.ethz.ch
[mailto:r-help-request at stat.math.ethz.ch]
Sent: Tuesday, July 01, 2003 3:09 AM
To: r-help at stat.math.ethz.ch
Subject: R-help Digest, Vol 5, Issue 1
At 18:48 30/06/2003, Martin Wegmann wrote:
>hello,
>
>I want to do a test for spatial correlation.
>I tried it with geary.test() but I don't understand the
2009 Jun 06
1
large numbers of observations using ME() of spdep
Dear All,
We aim to remove the spatial structure of our data using Moran Eigen
Vectors and spdep package . Our data has 3694 samples and 13
variables.
The computer stop working after almost 4 days of processing (we found
it emitting a sharp sound and with all colors on the screen. No
wories, it was restared without problem!). And we are left with
nothing: no result file was produced since the
2003 Jun 06
2
Moran's index
Hi,
I am looking for some code for Moran's I. Has anyone previously done this?
I have been unable to find it in the search engines.
James
2006 Mar 24
1
who can tell me the reason why it is different on calculating Moran's I using ARCGIS, Geoda and R?
The attachment is my dataset:
1.ccc.shp (the original data)
2.ccc.gwt, which is computed by Geoda;
Introduction to the variables in my data:
ID: key variable;
N_LATITUDE: latitude measured by GPS;
E_LONGITUD: longitude measured by GPS;
LIVES: attribute data
I get the different result of Moran's between ARCGIS and Geoda, R, why?
ARCGIS:spatial statistics tools:spatial
2011 Aug 04
1
Running a column loop through the Moran.I function.
Dear R users,
I have two data frames that consist of statistical information for most
countries around the world. One dataframe consists of the latitude and
longitude ("coord.csv") of each country, while the other consists of 100's
of different attributes ("countryattri.csv") for each country (like, GDP,
Population, etc.). The data is organized with a header and then
2005 Mar 04
1
R: Moran's I
Hi-
I would like to assign distance classes (lags) to the moran''s I test in R.
I don¹t have equally spaced points since I was mapping shrubs across a
landscape (vs. an experiment or survey in a grid). I somehow need to
select points based on the distances in the distance matrix (i.e., I need to
select all pairs of points that occur 0-25 m from each other, 25-50 m,
etc...).
Does
2009 Aug 17
0
Question spdep package - Moran's I
Dear all,
I have a question regarding the spdep package:
Assume that each person within my dataset is characterized by a continuous variable y. In order to test for spatial autocorrelation in y I calculated a Moran's I statistic. The problem is that y is also likely to be influenced by a series of other variables x that are unique to each person in my dataset. To test to which extent the
2004 Mar 26
1
How to do the significant test on Local Moran's I
Dear Danlin Yu:
I read your message at https://stat.ethz.ch/pipermail/r-help/2003-April/030754.html. Actually, I have a question about significant of Local Moran I too. based on it's function:
Ii = zi [¦²j wijzj],
I wonder how can I calculate it's z-value.
Any suggest will be greatly appreciated.
Louis Zhang
Dept of Geography and Planning
The Univ.
2004 Jun 18
1
how to store estimates results as scalars of a matrix?
Dear R users,
I've written a loop to generate Moran's test (spdep package) on serval
subsamples of a large dataset. See below a short example.
My loop is working fine, however I would like to be able to store the test
results as lines of a matrix, that I would latter be able to export as a
dataset. My problem is that I'm not sure how I could do this using R.
Any help will be much
2006 Mar 14
1
help on moran's I index of point pattern, not areal pattern
hi,friends,
we all know that moran's I index and Geary'C index can be used to test
spatial autocorrelation in both the area data and point data, but i only can
find something on how to calculate on the data of area, and can't find the
methods to perform it on the point data, could anybody give me some
information, thanks in advance!
--
Kind Regards,
Zhi Jie,Zhang ,PHD
Department of