t.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
-
Ashton Shortridge
Associate Professor ash...@msu.edu
Dept of Geography http://www.msu.edu/~ashton
235 Geography Building ph (517)
z-
value. Maybe something like this would work:
par(pty="s") # square plotting region
plot(coor2[,1], coor2[,2], main="Locations") # Just the locations
plot(coor2[,1], coor2[,2], main="Nueva2 at my Locations",
col=rainbow(n=10, start=0.50, end=0.65)[cut(nueva2,10)
tive (though this frequently seems to make
little difference in practice).
Of course, you can use both to develop predictions, or prediction surfaces,
and take the difference of the two to see how much your choice matters. In the
end, perhaps employ the method that you find simplest to explain
eter?
>
> Thank you very much,
> Gema
>
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>
--
Ashton Shortridge
A
function is just too slow for now.
>
> Any other ideas?
>
> Thanks,
>
> Pete
>
> Ashton Shortridge wrote:
> > Hi Tom,
> >
> > There isn't any Mean Squared Error from kriging, assuming you are using
> > all the points in the model, because t
(and metadata) via the OpenLayers.
> >>>
> >>> These are only our wishes of course. We do not know if all this is
> >>> really possible with the current software.
> >>>
> >>> Any examples or comments/suggestions/experiences are welcome
>
s apples and oranges, really.
>
> > Any advice or help will be highly appreciated
>
> I can see that this section of the book is indeed very dense;
> introductions to collocated cokriging are (IIRC) Pierre Goovaerts book
> and perhaps GSLIB literature. Wackernagel's book is also very brief
th themselves
> > and with you pretty well for your test location:
>
> It would be great to have GNaster added.
>
> >> GNgtopo30(34.63874,-79.10111)
> >
> > gtopo30 lng lat
> > 1 46 -79.10111 34.63874
> >
> >> GNaster(34.63874,
veral choices. write.asciigrid in the sp package might be all you
need. Similar functionality is in writeAsciiGrid in maptools. If not, check
out the rgdal package, which can handle a number of raster data formats.
Yours,
Ashton
--
Ashton Shortridge
Associate Professor ash..
ion DEMs are
becoming available. Also, I think this ASTER-derived product has captured
higher latitude locations than SRTM (which gets to about 60N and 60S), so it
may be not simply the best but the only choice for many regions.
Ashton
--
Ashton Shortridge
Associate Professor
er graphics, in my
latest article.
The same goes for non-free GIS software, by the way. My cartographer
colleagues who use ArcGIS generally haul mapping output from there into other
packages for font and other effect rendering.
Yours,
Ashton
--
Ashton Shortridge
Associate Professor
gu
> for(i in 1:4) gu[i] = pairsv(i,5)
> for(i in 1:3) gu[i+4] = d[5]^(i-1)
> lu = inv(Gu) %*% gu
>
>
>
>
>
>
> [[alternative HTML version deleted]]
>
--
Ashton Shortridge
Associate Professor ash...@msu.edu
Dept of Geography
;-readOGR(".","test")
> >
> > Error: could not find function "readOGR"
> >
> > [[alternative HTML version deleted]]
> >
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> > R-sig-Geo mailing list
> > R-sig-Geo@stat.ma
to some
sort of comma-delimited file, and read that into R - and I have no problems on
my 2 year old pc loading 64,000 records of xyz data, or actually many times
that number. There are surely simpler solutions that wouldn't involve much if
any coding, but I have direct experience wi
n CRAN. I have interpreted the
> phrase 'based on starting R from within the GRASS environment' to mean
> the package is for those who use GRASS and want to access functions
> within R.
>
> cheers, and thanks again for the feedback and help
>
> Josh
>
--
Ashton
Principal
> Component Analysis, II Edition, Springer Verlag,2002).
>
> Could you suggest something more rigorous?
>
> By the way, do you think I would have been better off by using something
> different from PCA?
>
> Best,
--
Ashton Shortridge
Associate Professor
yllcorner 0.00
cellsize 10.00
NODATA_value -
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
yours,
Ashton
--
Ashton Shortridge
Associate Professor [EMAIL PROTECTED]
Dept of Geography http://www.msu.edu/~ashton
235 Geography Building ph (5
On Wednesday 19 November 2008 02:33:46 pm Alessandro wrote:
> I have a points shape and I wish to calculate the geometric centre of this
> points shape and create a new points with R. But It's over my knowledge. Is
> there suggestions?
This seems straightforward, even if it is not implemented in a
don't sure about the result. Is It this code correct?
>
> Thanks Ale
>
>
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--
Ashton Shortridge
Associat
1)
>
> ***
>
> Couple of issues/questions:
> 1) The code doesn't actually seem to work -- I get a tiny, unreadable
> TIFF out of the back of this algorithm -- what is wrong?
> 2) I'm actually unclear about exactly what this is doing -- am I really
> just creatin
if
they aren't then the model will be flawed, so be cautious of that.
Hope this helps,
Ashton
--
Ashton Shortridge
Associate Professor [EMAIL PROTECTED]
Dept of Geography http://www.msu.edu/~ashton
235 Ge
Hi Sarah,
This looks interesting and relevant:
http://www.leg.ufpr.br/mbgbook/
On Tuesday 26 August 2008, Edzer Pebesma wrote:
> Diggle & Ribeiro
--
Ashton Shortridge
Associate Professor [EMAIL PROTECTED]
Dept of Geography http://www.msu.edu/
=c(1,1). Note that offset= may be from the NW
> corner, not the SW corner, and that the arguments are (often) ordered
> (y, x).
>
> Roger
I'll just add to that: opening raster files is fairly expensive, so if you are
sampling many locations over many tiffs you will see great sp
, which only allows for square grids?
>
> Thanks in advance for any help,
> Matt
>
> *
> Matt Farnsworth
> Disease Ecologist
> Spatial Epidemiology Unit
> Centers for Epidemiology and Animal Health
--
Ashton Shortr
") Analysis Tools are very useful in an ESRI environment, as are
built in commands and extensions in many GIS.
yours,
Ashton
--
Ashton Shortridge
Associate Professor [EMAIL PROTECTED]
Dept of Geography http://www.msu.edu/~ashton
235 Geography Building
is here:
http://www.psych.ualberta.ca/%7Ealinda/PDFs/Friedman%20Kohler%20%5B03-Psych%20Methods%5D.pdf
Yours,
Ashton Shortridge
Michigan State University
On Wednesday 16 July 2008, Marco Helbich wrote:
> Dear list,
>
> Is there a package available, which computes the "bidim
ore
about these issues and to help determine if what I wrote is useful for you.
The URL for the normal score code is:
http://www.msu.edu/~ashton/temp/nscore.R
Yours,
Ashton
--
Ashton Shortridge
Associate Professor [EMAIL PROTECTED]
Dept of Geography
convince" readGDAL()
to carry on with the input in spite of this error?
Thanks in advance for any suggestions.
Ashton
--
Ashton Shortridge
Associate Professor [EMAIL PROTECTED]
Dept of Geography http://www.msu.edu/~ashton
235 Geography Building
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