Hi,
alphahull is nice but having a SpatialPolygonsDataFrame from the result is
quite tricky
If anyone has the solution..
2012/6/22 Michael Sumner mdsum...@gmail.com
Try the alphahull package, which is on CRAN.
I don't believe it will smooth the result for you, but you could take
it from
Hi,
My final goal is to generate a graph from a road network. I didn't manage
to install shp2graph correctly, so I want to do it from scratch.
Is there a way to break lines at intersection but without rgrass?
Also, apart from shp2graph which seems a very good package, does one exist
that would
Hi,
I would examine the Lagrange multiplier specification tests from a lm() fit.
like:
fit1-lm(yield~Temp+precept, data=data)
lm.LMtest(fit1, listw=ND_queenW, test=all)
and see which of the tests has the largest significant test statistic.
That will let you know if your data follow a lag or error
I never worked with geoR package for interpolation pourposes. Have you
already checked the gstat package ? Further, do you have any idea of which
model would be the best for fitting the data you're working on (exponential,
spherical, gaussian, etc ?).
Give me more information so I can help you
Can you share what you've tried? A triangulation is really at odds
with the representation available with polygons in their usual GIS
form, but there are ways to do it. The basic options (to me) are
either a set of the triangles as individual polygons, or even a set of
shapes in a multipolygon, or
Dear Robert,
I have a script where I am cutting large raster stacks into slices by using the
crop function. Until recently, the script worked without a problem. In the mean
time, I upgraded from R version 15.0 to 15.1 and from raster version 1.9-x to
2.0-x. Today I noticed, that I still can
Hello geo-savvy R people,
I am new to this list so please be forgiving if I don't include everything
that is needed. I am having trouble with some code I wrote using the
gdistance package.
#I loaded an ESRI ascii grid file
cost - read.asciigrid(filepath, as.image = F, plot.image=F,, proj4string
The raster is probably too big? -- difficult too know without access to your
file.
A limitation of gdistance is that everything should be done in memory.
You could try to aggregate the grid.
You should remove all NA values from the raster. Running trim() is not enough.
You can use standard
