thanks for help. I have a polygon shapefile but I have a problem to read
with readOGR
sample <- readOGR(".", "sample")
OGR data source with driver: ESRI Shapefile
Source: ".", layer: "sample"
with 766 rows and 4 columns
Feature type: wkbPolygon with 2 dimensions
Errore in validityMethod(objec
On Mon, 30 Mar 2009, Tyler Dean Rudolph wrote:
Hello Roger,
This certainly does shed a lot of light on the mechanism behind the error
and your code is greatly appreciated. Now for the question: did your final
line of code work??? When I tried it on my machine it took over 4 hours
without comp
This may be useful. It is part of a function that I put together a
while ago to measure the length of common borders. It's been a while
since I used it.
common.border <- function(shp){
if(length(slot(shp,"polygons"))!=2) stop('This function only
handles
two polygons at a tim
Dear R-helpers
I have two SpatialPolygonsDataFrame objects, but I want to plot only the
boundary between them. The boundary object is to be overlaid I plot that
I have made, so I would strongly prefer a method that does not rely on
grid graphics.
Thank you in advance for any pointers.
K
did you try
require(class)
?knn
there are many cluster packages available
On Mon, Mar 30, 2009 at 2:04 PM, Donal Bisanzio wrote:
> I'm a Italian PhD student. My research is focused on using GIS system to
> study vector-borne diseases. I use open-source software, GRASS and R, to
> make my analysi
I'm a Italian PhD student. My research is focused on using GIS system to
study vector-borne diseases. I use open-source software, GRASS and R, to
make my analysis.Now I'm trying to evaluate spatio-temporal cluster in my
data. I know that in proprietary software, as Cluster-Seer, there are
different
On Mon, 30 Mar 2009, Adalberto Pineda wrote:
Thank you for your replies but it's my understanding that (for an adaptive
model) the percentage
should be entered at the "adapt" argument (based on the spgwr package manual
and Roger's reply
to this posting:
https://stat.ethz.ch/pipermail/r-sig-ge
Thank you for your replies but it's my understanding that (for an adaptive
model) the percentage
should be entered at the "adapt" argument (based on the spgwr package manual
and Roger's reply
to this posting:
https://stat.ethz.ch/pipermail/r-sig-geo/2005-August/000535.html).
Also, the gwr
Hello R sig Geo list,
Can anyone suggest methods for performing spatial bootstrap to obtain
standard error of the semivariogram
range parameter for geostatistical data?
I've estimated the range parameter in semivariograms of herb cover by
generating 2.5 and 97.5
percentile bounds from 1
Try:
Zone_2644149 = readGDAL("Zone_2644149.asc")
This returns a SpatialGridDataFrame.Then:
fullgrid(Zone_2644149) = FALSE
converts into a SpatialPixelsDataFrame, or, in a single command:
Zone_2644149 = as(readGDAL("Zone_2644149.asc"), "SpatialPixelsDataFrame")
--
Edzer
gianni lavaredo wrot
On Mon, 30 Mar 2009, gianni lavaredo wrote:
Dear R user,
I have an ascii file (It's a raster in Arcmap) and I wish to import in R
to do some analisys. I am using like help
Zone_2644149 = readGDAL("Zone_2644149.asc")$band1
Zone_2644149.asc has GDAL driver AAIGrid
and has 246 rows and 381 column
Dear R user,
I have an ascii file (It's a raster in Arcmap) and I wish to import in R
to do some analisys. I am using like help
Zone_2644149 = readGDAL("Zone_2644149.asc")$band1
Zone_2644149.asc has GDAL driver AAIGrid
and has 246 rows and 381 columns
str(Zone_2644149)
num [1:93726] 35.1 34.7 3
On Sun, 29 Mar 2009, Tyler Dean Rudolph wrote:
As you've indicated Roger there does appear to be an error in
readShapeLines() under maptools. However I can't help but wonder why I do
not have any problems using the same command sequence for a subset of
the same data (even after updating my vers
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