Displaying 20 results from an estimated 300 matches similar to: "Suppressing (or changing) the colours when using spatstat plot.quadratcounts"
2008 Oct 22
1
Spatstat help - quadratcount query
Hi all,
I am using quadratcount in spatstat to divide a window containing a
point pattern into a grid of quadrats containing the intensity of points
in each quadrat. My data is in UTM co-ordinates. My window is defined
as follows:
>p15<-ppp(x,y,window=owin(c(341710,342100),c(3126465,3126780)),marks=NUL
L, checks=TRUE)
Giving me a distance of 390m in the 'x' direction and 315m in
2009 Dec 08
1
Quadratcount problem in spatstat
Hi,
I know there are older threads discussing the quadratcount function in
spatstat. Unfortunately, I could not find a solution to my problem there.
I'm analyzing a point pattern in an irregular polygonal window. Both the
window (an entire country) and the points are projected using WGS84.
When I do quadratcount with only one quadrat for the entire country it
holds all my 154 points:
2012 Sep 19
0
Lowest AIC after stepAIC can be lowered by manual reduction of variables (Florian Moser)
A few general comments about stepwiseAIC and a suggestion of how to select models
a) Apart form the problem, that stepwise selection is not a garanty to get the best model, you need to have a lot of data to avoid overfitting if your model includes 7 parameter plus interactions (> 10 observations per parameter is what you are ideally looking for).
b) Have a look at Anderson and Burnham's
2017 Nov 28
0
Extract all point in a quadrats by spatstat package
Hi,
With the following code i can divides window into quadrats and counts the numbers of points in each quadrat.
library(spatstat)
X <- runifpoint(50)
quadratcount(X)
quadratcount(X, 4, 5)
quadratcount(X, xbreaks=c(0, 0.3, 1), ybreaks=c(0, 0.4, 0.8, 1))
qX <-? quadratcount(X, 4, 5)
plot(X)
plot(qX, add=TRUE)
But I want to mark each? quadrats? and select/ extract only those points by
2007 Apr 27
1
Quadratcount() plotting in R spatstat
Hello,
I am trying to plot a quadratcount object over a ppp object in the spatstat
package. I ultimately want to get something like this
http://bg9.imslab.co.jp/Rhelp/R-2.4.0/src/library/spatstat/man/images/big_quadratcount_001.png
http://bg9.imslab.co.jp/Rhelp/R-2.4.0/src/library/spatstat/man/images/big_quadratcount_001.png
See
2012 May 31
3
Quadrat counting with spatstat
I have photographs of plots that look like so:
http://r.789695.n4.nabble.com/file/n4631960/Untitled.jpg
I need to divide it up so each circle has an equal area surrounding it. So
into 20 equal segments, each of which contains a circle. Quadratcount is not
sufficient because if I divide it up into 36 equal quadrats, some quadrats
do not contain one of the circles.
I'm not even sure how to
2003 Jan 17
2
barplot plotting problem
Hi,
Is there any equivalent of type="n" when constructing barplots which will
still construct the axes (plot=F, as it says doesn' plot anything at all).
Alternatively I tried setting col="white" and border="white" but the border
command does not seem to be operational. True??
Any other ideas? What I'm actually trying to do is construct vertical
abline()'s
2010 Oct 15
0
tessellation from biological data in spatstat
Hi,
I'm new to this mailing list so apologies if this is too basic. I have
confocal images 512x512 from which I have extracted x,y positions of the
coordiates of labelled cells exported from ImageJ as a.csv file. I also
have images that define an underlying pattern in the tissue defined as
areas of different pixel values 0 or 255 (also 512x512) I've exported
these images as .txt
2010 Oct 16
0
Spatstat Tessellation error
Hello R Users,
I am trying to do a quadrat count defined by covariate properties in
spatstat. I have read my elevation raster into R (from ascii) and converted
to class "im" for use in spatstat.
Now I have point data of class "ppp" which window is the same extent as the
elevation image. I can conveniently plot the image and the points on the
image as follows:
2010 Oct 20
0
Spatstat: tessellation problems.
Hello R Users,
I am trying to do a quadrat count defined by covariate properties in
spatstat. I have read my elevation raster into R (from ascii) and converted
to class "im" for use in spatstat.
Now I have point data of class "ppp" which window is the same extent as the
elevation image. I can conveniently plot the image and the points on the
image as follows:
2005 Jun 09
3
[Bug 1054] Nmap Causing SSH Session to Prematurely End
http://bugzilla.mindrot.org/show_bug.cgi?id=1054
Summary: Nmap Causing SSH Session to Prematurely End
Product: Portable OpenSSH
Version: 3.8.1p1
Platform: All
OS/Version: Mac OS X
Status: NEW
Severity: normal
Priority: P2
Component: ssh
AssignedTo: bitbucket at mindrot.org
ReportedBy:
2006 May 20
0
GLM with nested design
Dear list members,
I'd like to perform a glm analysis with a hierarchically nested design. In
particular,
I have one fixed factor ("Land Use Classes") with three levels and a
random factor ("quadrat") nested within Land Use Classes with different
levels per classes (class artificial = 1 quadrat; class crops = 67
quadrats; and class seminatural = 30 quadrats).
I have four
2011 Feb 22
0
Which function in R package "Spatstat" can help me to get the Cramer-von Mises statistic
Hi all,
When I detect the spatial point pattern, I want to use the Cramer-von Mises
statistic to assess the curve-wise significance of deviations from null
hypotheses. Who can tell me which function in R package "Spatstat" can do
this work?
Thanks a lot
Jeff
[[alternative HTML version deleted]]
2007 Oct 17
0
Problem loading spatstat.
I upgraded to R version 2.6.0 yesterday; now I find that I can't load
spatstat.
I re-installed spatstat (that part seemed to work without complaint)
but when
I execute
> library(spatstat)
I get the error message
Error in dyn.load(file, ...) :
unable to load shared library '/Users/rturner/Rlib/spatstat/libs/
i386/spatstat.so':
2010 Jan 18
1
how to install spatstat
Hi,
I tried to install spatstat using:
install.packages("spatstat", dependencies = TRUE, lib =
"./R/i486-pc-linux-gnu-library/2.8")
but got the following msg:
--- Please select a CRAN mirror for use in this session ---
<here i selected one mirror, and tried several mirrors)
Loading Tcl/Tk interface ... done
Warning message:
In install.packages("spatstat",
2011 Feb 16
1
help with spatstat ppp transformation data
Hello
I am currently studying spatial distribution of lizards in Spain and
Germany. For this I am using the spatstat package of R to make a
Kolmogorov-Smirnov
test of CSR of unmarked points data.
I have problems transforming the data to ppp class, and I would like to know
if you can help me. I have already made the test with the data of
'japanesepines' that comes with the package, and
2011 Mar 31
0
Help: creating owin{spatstat} objects from GIS data
Dear R list,
I'm trying to create an object of class "owin" (observation window) in the
package spatstat from GIS mapping data. Here's an example of my problem.
Everything
goes well until the last line of code. I get the error message shown at the
bottom:
library(spatstat)
library(sp)
library(maptools)
con <- url("http://gadm.org/data/rda/CHE_adm1.RData")
class(con)
2010 Nov 26
1
Plotting envelopes in spatstat
Hello,
Somehow I cannot control my envelope plots on Spatstat package. I would like
to plot an envelope with no legend and also I would like to label the plot
as such:
>plot(envelope(data, nsim=39, main="My K Plot", legend=FALSE,
xlab="Distance")
But somehow the "main", "legend" and "xlab" calls do not have any effect on
the plot. Can someone
2011 Feb 15
0
spatstat ppm models with covariates
Hello R users,
I am fitting spatial point process models in spatstat using ppm and my models
actually contain spatial covariates. The results of the models are returned
with some levels of the covariates absent. eg when I fit a model with "aspect"
using:
ppm(points, ~aspect, covariates=list(aspect=aspect))
the results give coefficients for "North"," South",
2005 Sep 21
1
ppp from SpatStat
Hi
I want to extract the points from an object of type ppp.
How can I do this?
Rainer