Dear Young Li,
I think there are other best solutions, but you can
start using:
> require(akima)
> ?interp
Best wishes
miltinho astronauta
brazil
On Tue, Jan 13, 2009 at 7:31 PM, Yong Li wrote:
> Dear All,
>
>
>
> I have a points raster file (e.g. crop yield derived from RS) and I want
> to
On Tuesday 13 January 2009, Edzer Pebesma wrote:
> This sounds very familiar; I ran into this about 6 years ago or so.
Could it be related to this ticket:
http://trac.osgeo.org/gdal/ticket/2369
???
should be fixed in a recent GDAL build.
Cheers,
Dylan
> The asciigrid driver in gdal reads th
Dear All,
I have a points raster file (e.g. crop yield derived from RS) and I want
to interpolate these discrete points in this 2D raster domain into a
continuous crop yield surface for other further use. I knew I can do it
in ILWIS and GRASS, but not sure within R.
Any comments are appreciate
Dear All,
I have a points raster file (e.g. crop yield derived from RS) and I want
to interpolate these discrete points in this 2D raster domain into a
continuous crop yield surface for other further use. I knew I can do it
in ILWIS and GRASS, but not sure within R.
Any comments are appreciated.
This sounds very familiar; I ran into this about 6 years ago or so.
The asciigrid driver in gdal reads the first so 100K of the file to
figure out whether the data are integer or floating point. It then
searches for a dot in any of the numbers, indicating floating point
data. If it doesn't fin
Roger,
Thanks for your help. I believe you are correct that the printed summary
values have been rounded. I couldn't quite figure out how to extract the
range specifically, but when I did a summary for the data.frame from each
grid I got what I was expecting for the one created by readAsciiGr
On Tue, 13 Jan 2009, Brian R Miranda wrote:
Hello,
I have an Ascii grid that was created using the GridAscii command in
ArcGrid. The grid represents cell distance to railroads and has values
ranging from 0 to 37,082. When I bring this grid into R as a
SpatialGridDataFrame, the maximum and/or
Hello,
I have an Ascii grid that was created using the GridAscii command in
ArcGrid. The grid represents cell distance to railroads and has values
ranging from 0 to 37,082. When I bring this grid into R as a
SpatialGridDataFrame, the maximum and/or the minimum values in the grid do
not exact
On Tue, 13 Jan 2009, Myers, Joshua wrote:
I am using R 2.8.0 and Windows XP Professional, and the latest version
of spgwr package and the latest versions of spgwr's dependent packages.
In using the gwr function inside of spgwr, I can run it fine until I
input fit points. The x,y fit points mat
I am using R 2.8.0 and Windows XP Professional, and the latest version
of spgwr package and the latest versions of spgwr's dependent packages.
In using the gwr function inside of spgwr, I can run it fine until I
input fit points. The x,y fit points matrix I am entering is in the
same form as the
Hi there: we have some multivariate datasets (some point measures, some grid or
polygon-based) within which we wish to perform bivariate correlation tests
(Spearman and Pearson) to determine which if any pairwise correlations are
significant. One application would be variable selection within gr
> Pebesma, E.J., Duin, R.N.M., Burrough, P.A., 2005. Mapping
> sea bird densities over the North Sea:
> spatially aggregated estimates and temporal changes.
> Environmetrics 16(6), 573--587.
> http://dx.doi.org/10.1002/env.723
> (The authors claim to have put the R script on-line but I
> could
Dear Katona,
R (i.e. its packages) are definitively suited for analysis of spatio-temporal
data. Try searching
the packages in the [http://cran.r-project.org/web/views/Environmetrics.html]
views; in fact, there
is a section dedicated to time-series
[http://cran.r-project.org/web/views/TimeSeri
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