Hello, i post again my last mail because i don't see it in the mail-archive:
Hello,
I didn't see the following message error because the sink() function was
running in my function :
var2-as(var,psp)
Erreur dans owin(xr, yr, poly = list(x = xr[c(1, 2, 2, 1)], y = yr[c(1, 1, :
yrange should
Dear R users
I am currently investigating time series analysis using an irregular time
series. Our study is looking at vegetation change in areas of alien vegetation
growth after clearing events. The irregular time series is sourced from Landsat
ETM+ data, over a six year period I have 38
Dear Roger,
thank you for your help. There is something I don't quite understand.
If I compare distances between the converted coordinates (SP.utm.wgs)
with the coordinates (SP.wgs) that I use to compare with (in pairs),
the distances are more variant than I expected. These go from
approximately
On Thu, 2 Apr 2009, Marc Marí Dell'Olmo wrote:
Dear Roger,
thank you for your help. There is something I don't quite understand.
If I compare distances between the converted coordinates (SP.utm.wgs)
with the coordinates (SP.wgs) that I use to compare with (in pairs),
the distances are more
Thanks to Roger (and with many useful comments from Augustin) GRASS just got
another big user -
possible even many more :)
Roger has prepared an update of his package spgrass6 that can now be used to
control the GRASS
processing from R (functions: initGRASS, execGRASS). This way one can skip
Hello Wesely,
The appropriate way to address irregular time series depends on what want to
use the estimates for. If your objective is to estimate the times that you
don't observe (interpolate) then a natural cubic spline is a good method to
provide such an estimate. If your objective is to
On Thu, 2 Apr 2009, Tomislav Hengl wrote:
Thanks to Roger (and with many useful comments from Augustin) GRASS just
got another big user - possible even many more :)
Roger has prepared an update of his package spgrass6 that can now be used to
control the GRASS
processing from R (functions:
Hi - I've a (probably basic) plotting problem which I'm having
difficulty solving with reference to ?spplot, and ?panel.spplot. I have
a SpatialPolygonsDataFrame and a SpatialPointsDataFrame. The points are
the centroids of the polygons. The polygons plot very nicely through
spplot()when coloured
Dear Jim,
Dormann et al (2007) gives a nice summary.
@ARTICLE{DormannEtAl2007,
author = {Dormann, Carsten F. and McPherson, Jana M. and Ara\'{u}jo,
Miguel
B. and Bivand, Roger and Bolliger, Janine and Carl, Gudrun and
Davies,
Richart G. and Hirzel, Alexandre and Jetz, Walter
