Many thanks for these references / library Clément - they are very useful.
Best
Stepen
On 25/03/2011, at 7:59 PM, Clément Calenge wrote:
> I am not sure, but wouldn't the function kernelkcbase from the package
> adehabitatHR fit your needs? it implements the product kernel estimator over
> sp
If image(gridData) works, then image(xbrks, ybrks, gridData) should
work as well, and plot with the correct spatial coordinates - this
assumes that xbrks and ybrks correspond to the dimensions of gridData
- either exactly (the centres) or longer by one element (the corners).
In the sp package you
Hi all,
I have the following datasets and am trying to generate a spatial grid which
can be plotted (somewhat like the object created by spatstat's quadratcount):
Dataset 1: A table containing a known number of cells, each value relating to
the intensity at a given cell.
> str(gridData)
table
Hi all,
I have the following datasets and am trying to generate a spatial grid which
can be plotted (somewhat like the object created by spatstat's quadratcount):
Dataset 1: A table containing a known number of cells, each value relating to
the intensity at a given cell.
> str(gridData)
table
Dear 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(mapto
I'm doing some beta testing with R 2.13. When I tried to install the
Spatial task view, it threw an error:
Error in split.default(X, group) : first argument must be a vector
In addition: Warning message:
In .get_pkgs_from_ctv_or_repos(views = views, coreOnly = coreOnly, :
CRAN task view Spati
On Wed, 30 Mar 2011, Barry Rowlingson wrote:
2011/3/30 Virgilio Gómez-Rubio :
Barry,
What you propose is what I would do too. Another approach is to display
the adjacency matrix as a graph (i.e., vertices for the "location" of
the country and edges for the connections between them). I would sa
2011/3/30 Virgilio Gómez-Rubio :
> Barry,
>
> What you propose is what I would do too. Another approach is to display
> the adjacency matrix as a graph (i.e., vertices for the "location" of
> the country and edges for the connections between them). I would say
> that all the countries whose vertex
Barry,
What you propose is what I would do too. Another approach is to display
the adjacency matrix as a graph (i.e., vertices for the "location" of
the country and edges for the connections between them). I would say
that all the countries whose vertex can be surrounded by edges will be
land-lock
Given a region divided into polygons, how can I find which polygons
have any edges that are not neighbouring other polygons?
For example, if the region is Africa and the polygons are countries,
I want to find the land-locked and non-landlocked countries.
My first idea is to create a large rect
Thanks Alex
I am looking at the spDists function at the moment, if my points of interest
lies at a distance smaller than the accuracy of the reading I have a match.
Somewhat simpler approach maybe :-)
On 30 Mar 2011, at 2:48 PM, Alexandre Villers wrote:
> Hi,
>
> Have a look at the disc() func
Hi,
Have a look at the disc() function in spatstat. I guess you can then
either do what you aim at directly with spatstat, or after converting
spatstat objects to sp class with maptools appropriate functions.
HTH
Alex
On 30/03/2011 15:39, Pieter Botha wrote:
Hi
I have a SpatialPointsDataF
Hi
I have a SpatialPointsDataFrame, originating from location readings from an
Android device. These readings are received as latitude / longitude as well as
an accuracy reading in meters. An csv dump of the SpatialPointsDataFrame can be
downloaded here: http://www.ploemp.com/opla/statp.csv
I
Thanks for your help...
I am still unable to generate those minor ticks marks but my knowledge in
Lattice is greatly improving.
I have hope and if I find a solution I will come and post it here.
Thanks.
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