Thank you for your help!
I have finished my task.
Best regards.
2010/10/28 Robert J. Hijmans r.hijm...@gmail.com
Hi Mike,
Thanks for that suggestion, It had not occurred to me to overload
as.matrix. Done that now (raster version 1.6-7) such that
as.matrix(projras) works.
Best, Robert
Dear all,
I performed gwr() and obtained predictions for 31223 data points. Now
I want to calculate prediction error variance at each estimation
point. Is there a function to calculate them or do you have any idea
about calculating these values?
Thanks!
Pinar
On Thu, 28 Oct 2010, Pinar Aslantas Bostan wrote:
Dear all,
I performed gwr() and obtained predictions for 31223 data points. Now I
want to calculate prediction error variance at each estimation point. Is
there a function to calculate them or do you have any idea about
calculating these
Hi all!
As a newcomer to both r and spatial econometrics I am trying to become
familiar with both worlds. I have a question which is hopefully not too
trivial: I am trying to create a second order queen matrix for European
regions. As indicated in the documentation on spdep nblag and
Thanks for the heads up I was going to switch to 2.12.
Guess I will wait for resolution to your issue since I use Kyngchaos
2010/10/27 Ralf Schäfer sena...@ecotoxicology.de
Hello,
don`t know if this issue is already fixed given that Roger posted an
answer.
However, I just installed from
I have a list of points as (X,Y,value) corresponding to longitude, latitude,
value. The points come from files that are assigned crs=+proj=longlat
+datum=WGS84
My goal is to convert this list into some type of geographically referenced
vector format, and then to reproject it to NAD83 Alaska
On Thu, 28 Oct 2010, Hauser, Christoph wrote:
Hi all!
As a newcomer to both r and spatial econometrics I am trying to become
familiar with both worlds. I have a question which is hopefully not too
trivial: I am trying to create a second order queen matrix for European
regions. As indicated
Hello!
I have a problem.
I am using IDW to interpolate a daily series of geospatial
observations. Thus, I want to produce a large number of sequential
maps.
I want them to all represent the same color scale. Is there any way to
fix the color scale so that it is the same for all the plots?
Dear Tom,
Here are some hints:
Do you really have a list object? Or do you have a matrix or data.frame?
If you have a matrix 'xyz', create a data.frame like:
xyv - data.frame(xyv)
library(sp)
#define crs
crs - CRS(+proj=longlat +datum=WGS84)
# create sp object
pts -
Sorry, if my post lead to misinterpretation - I basically only wanted to give
the code that allows for installing rgdal under 2.12 on Mac OS X.
Somebody else posted this question a couple of days ago and the code below
resolved the issue for me. So you don`t need to wait necessarily unless you
Hello all,
I have a grid of points and a spatial polygon shape file. I want to
clip the grid so that I only have the point which lie within the
shapefile.
I tried the following code:
## create a grid onto which we will interpolate:
## first get the range in data
x.range - c(37,50)
y.range -
Hi Pete,
you get the indices of the points inside the polygons and the associated
polygon ID value.
something like
clip- grd[!is.na(overlay(grd, ccShapet)),]
should do.
Hope this helps, although I did not check the line in particular (just
from the top of my head)
Kamran
Am
Hi there,
I have a SpatialGridDataFrame object and I wish to round the coordinates
associated with the grid to three decimal places in order to match points in
this object with points on another spatial object where the coordinates are
recorded to three decimal places.
Some information about
Probably the best way to do this is to modify the GridTopology and
recreate the grid.
The coordinates of a SpatialGridDataFrame are calculated from the 6
values of the grid topology, only SpatialPixelsDataFrame stores every
cell coordinate (possibly sparsely).
It's best to recreate the object,
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