Statistical computing language and software environment.
1
vote
1answer
374 views
rpy2 installation ERROR “Tried to guess R's HOME but no R command in the PATH”?
I tried to install rpy2 (pip install rpy2). I want to use the SDAPP4 extension with QGIS (QGIS shows up the message missing rpy2...). The system tells me always the same error: Tried to guess R's HOME ...
4
votes
0answers
86 views
Route analysis in R based on the OSM transport network: possible?
I'm analysing the likely paths taken by commuters on their way to work, based on Census flow data, job density distributions and the transport network.
At the moment I'm using pgRouting and the ...
4
votes
0answers
401 views
How to get rpy2 for QGIS on OSX?
I am a new QGIS user, have installed QGIS on a Mac running Snow Leopard OSX 10.6.8 following all the instructions. QGIS seems to work well for everything other than when I boot up I get the message
...
3
votes
0answers
90 views
Draw two separate lines from A to B and B to A
I have an Origin-Destination table like this
Origin Destination Value
A B 10
B A 100
A C 120
...
For all the locations A, B, C... I have another table indicating their location (Lat and Lon)
Is ...
3
votes
0answers
97 views
How do I access layer attributes from within QGIS' manageR plugin?
This is probably a fairly basic question, but searches for manageR come up with a lot of noise, and there's no manageR tag. What I'd like to do is load the attributes from a particular field of a ...
3
votes
0answers
126 views
Rgeos drops associated values when intersecting polygons
I am trying to intersect two SpatialPolygonsDataFrames and get a SpatialPolygonsDataFrame as the result. Unfortunately, using the gIntersection function from rgeos (which works impressively quickly ...
2
votes
0answers
56 views
MODIS Level 1B batch process
I am a new MODIS Level 1B user. I have been using the MODIS Swath tool to process my images.
However, I have over 1000 images to process. I was wondering if there a script available in IDL or R (very ...
2
votes
0answers
148 views
How to Export a Shapefile as KML Using R
All,
I have exported an ESRI shapefile (polygon) to KML using R, but the resulting layer shows only the outer extent of the polygon.
How can I fill in the area with a color?
Any help is greatly ...
2
votes
0answers
80 views
Moving point on OpenStreetMap route
Basically I generate random numbers in R language which are indeed times between bus arrivals.
I need to simulate a moving point(a bus) in OpenStreetMap by using this generated numbers.
I have read ...
1
vote
0answers
57 views
Why Stacking rasters return all values as NAs?
I have several rasters that I want to do some calculations ,basically calculating the moving average.
dir2 <- list.files("D:\\2010+2011", "*.bin", full.names = TRUE)
...
1
vote
0answers
169 views
How to clip the contour map with the polygon using R software?
Hi I am wondering how can I create the contour lines from the discrete x, y and z dataset and then add the shapefile to cut the contour lines by polygon.
I want to clip the contour map by the shape ...
1
vote
0answers
281 views
Raster grid for zonal statistics in R
I have two raster layer, the first one r is my zonal mask as a raster grid, and I created as:
ext <-extent(Yraster)
r <- raster(nrows=32,ncols=32,ext)
r[] <-(1:ncell(r))
and project it ...
1
vote
0answers
150 views
How to load big ASCII rasters in Revolution R?
Is there anyone in this site using Revolution R with big spatial data ?
I am trying to load raster files (ascii format) into revolution r using the xdf format, with no luck.
Did anyone tried this ...
1
vote
0answers
239 views
How do I implement 'weighted' kriging in R?
I'm trying to interpolate the values of an attribute (called "disease_rate") that i've sampled at a set of spatial points and i'd like to add 'weights' to the resulting kriging estimates.
Basically, ...
1
vote
0answers
255 views
Administrative level and coordinates from Yahoo GeoPlanet WOEID
The Yahoo GeoPlanet data can be freely downloaded from:
http://developer.yahoo.com/geo/geoplanet/data/.
If I understand it correctly, each WOEID corresponds to a unique location on earth, with ...
0
votes
0answers
56 views
R Raster package: write NetCDF with time dimension
I am writing a rasterbrick with multiple layers to a netcdf file using the raster package in R:
writeRaster(gridfile, "Data", "CDF", overwrite=TRUE,
...
0
votes
0answers
39 views
R-raster versus ArcMap Bioclim clipped values differ?
I have a set of lat/long ccordinates for which I wanted to pull corresponding BioClim (1-19) values. I first used ArcMap, without interpolating, and came up with a set of data. I then used R's ...
0
votes
0answers
108 views
Making a Bridge Classification tool in GRASS GIS
I'm working on a tool for classifying bridges with GRASS. I have been using examples online but I've come to a standstill as how to actually make this tool in GRASS. I have my raster of my area and ...
