Displaying 20 results from an estimated 2000 matches similar to: "Analysis of 3-dimensional spatial point patterns"
2002 Jun 21
2
Buffer in Windows holding samba info
My client is using Samba to read information on their web server from
SCO Open Server 5. They are having this problem:
Windows holds old information, rather than getting new information from
Samba once a file is updated.
Is there any way to force samba to go and look for new data everytime
Windows makes a request for data?
Thanks!
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K-Tag: I've upped my standards. Now up yours!
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2005 Oct 17
2
Insightful Announces: "R and S-PLUS- Panel Discussion" at 9th Annual 2005 User Conference
Event: 2005 Insightful User Conference
Dates: Oct 26-27, 2005
Location: Princeton, NJ
URL: http://www.insightful.com/news_events/2005uc/ for details on pricing,
hotel accommodations and to register for this event.
The Insightful 2005 User Conference is being held October 26th-27th in
Princeton, NJ. This year's conference focuses on the techniques and
methodologies pivotal to the
2009 Jan 11
2
I'm looking for a book about spatial point patterns (Diggle, 2003)
To understand some functions about spatial point patterns in "spatstat" ,I
should know some background about it, and the best way is to read the
monograph, and "Statistical Analysis of Spatial Point Patterns" (2nd edt.)
is a better choise. But I can not find it anywhere I can. Who can help me?
Thank you!
-----
unangu at gmail.com
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2012 Jan 06
2
Spatial data, rpoispp, using window with fixed radius?
Dear All,
I was searching through the spatstat manual in order to find a function to simulate a Poisson pattern only within a fixed radius (circular moving window) around individual points. If points are distributed heterogeneously over a large area this may help to only assess deviation from CSR within the window and thus does not require additional information on a covariate. I could not find
2012 Dec 07
1
Fwd: Simulation of spatial Log-Gaussian Cox process in Spatstat
Hello,
I have fitted a Log-Gaussian Cox Process on my data but when I try to
use "simulate.kppm" of the spatstat package I get this error:
Error in rLGCP(model = model, mu = mu, param = param, ..., win = win) :
The spatial domain of the pixel image ?mu? does not cover the
simulation window ?win?
I've used covariates as im, changed the npixel value of the spatstat
options to
2007 Apr 25
1
program avail. for simulating spatial patterns?
Hi all,
I am wondering if there is a function available in R for simulating
spatial distribution of objects (plants in this case) in order to
simulate sampling of a population . Specifically, I would like to be
able to change the spatial correlation of individuals. I don't want
to reinvent the wheel if it already exists.
Thanks,
Wade
2010 May 04
3
Kernel density estimate plot for 3-dimensional data
Hi!
I have a problem with Kernel density estimate plot for 3-dimensional data in ks-package.
Here the example:
# load ks, spatstat
# three-dimensional kernel density of B
B <- pp3(runif(300), runif(300), runif(300), box3(c(0,1)))
x <- unclass(B$data)$df
H <- Hpi(x)
fhat <- kde(x, H=H)
plot(fhat)
plot(fhat, axes=FALSE, box=FALSE, drawpoints=TRUE);
2008 Feb 09
1
Comparing spatial point patterns - Syrjala test
Dear Lists,
At several stations distributed regularly in space[1], we sampled
repeatedly (4 times) the abundance of organisms and measured
environmental parameters. I now want to compare the spatial
distribution of various species (and test wether they differ or not),
or to compare the distribution of a particular organism with the
distribution of some environmental variable.
2008 Jan 28
2
basic spatial query
Hello;
Please coud you advise me of a simple way to select points (x,y
coordinates) that fall within a polygon.
I've got a set of polygons, each one defined by an arbitrary number of
points, and several points inside each polygon.
I know this is simple with a GIS, but I'd rather do it inside R.
Thanks and best regards,
Javier
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2009 Aug 18
1
How to Dedup a Spatial Points Data Set
I'm new to spatial analysis and am exploring numerous packages, mostly
enjoying sp, gstat, and spBayes.
Is there a function that allows the user to dedup a data set with multiple
values at the same coordinates and replace those duplicated values with the
mean at those coordinates? I've written some cumbersome code that works,
but would prefer an efficient R function if it exists.
2012 Feb 03
3
SPATIAL QUESTION: HOW TO MAKE POLYGONS AROUND CLUSTERS OF POINTS AND EXTRACT AREAS AND COORDINATES OF THESE POLYGONS?
Imagine that I have a large number of points (given by coordinates x and y) that vary in density per space. For the purpose of demonstration it could be generated like this: s <- data.frame(x=runif(10000,0,900),y=runif(10000,0,900)); plot(s)
I want to create polygons around the points where point density is greater than a selected threshold (for example, by using krieging or equivalent
2009 Mar 06
1
help to use ppp in spatial analysis
Hi,
i am using spatstat package for spatial data analysis and now i have a problem to create a point pattern. The points are in file "points.txt" (first column for Latitude and second column for Longitude ) and I imported them and separated each columns in two arrays x and y. If I plots x and y ( e.g plot(x,y) ) the result appears in square area without problems and the scale is
2008 Sep 17
3
Need help creating spatial correlation for MC simulation
I want to create a dataset in R with spatial correlation (i.e. clustering)
built in for a linear regression analysis. Any tips on how to do this?
Thanks.
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View this message in context: http://www.nabble.com/Need-help-creating-spatial-correlation-for-MC-simulation-tp19542145p19542145.html
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2007 Nov 22
1
distance matrix to coordinate format for spatial stats
Greetings,
I would like to use some of the spatial statistics functions in R, but I am having trouble entering data. My data is already in a distance matrix format, not an X Y coordinate format (each Xij cell in the matrix represens the distance from point i to j). Does anyone know of a way to convert a distance matrix to a ppp object in spatstat, or an X,Y coordinate system for other
2005 Feb 21
1
is.matrix(), as.matrix, & as(,"matrix")
Under help(matrix) it is written:
'is.matrix' tests if its argument is a (strict) matrix. It is
generic: you can write methods to handle specific classes of
objects, see InternalMethods.
Further down, under "Details", the meaning of "strict" is explained
more explicitly:
'is.matrix' returns 'TRUE' if 'x' is a matrix
2008 Feb 26
0
Course on analysing spatial point patterns
A full set of course notes on
'Analysing spatial point patterns in R'
is now available at
<http://www.csiro.au/resources/pf16h.html>
The course is based on the package 'spatstat'. It includes a brief
introduction to R, a detailed introduction to the 'spatstat' package, and
a discussion of statistical methodology.
Adrian Baddeley
2009 Mar 03
1
spatial markov chain methods
Hello,
can any one point me to R-packages (if available) which include spatial
Markov Chain methods?
My second question is more general but hopefully not OT: Currently we
are using the software TPROGS, which let people simulate property
distributions in space by some Markov Chain approaches. We face some
problems due to the lack of information between distances of samples
along borehole path
2004 Aug 04
1
spatial econometric model for a simultaneous system
Hi,
Is there any package or functions in R that can perform
tests and estimation for a spatial econometric model in a
simultaneous system?
Thank you!!!
Xia Feng
2004 Aug 04
2
which package for spatial autocorr.
hello
which package do you recommend for spatial autocorrelation ?
regards
Ahmet Temiz
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2008 Jul 26
2
Spatial Sample
Hi!
How can I make a spatial sample?
Can someone recommend theorical books and materials for this?
--
Raphael Saldanha
UFJF - Brazil
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