Re: [R-sig-Geo] Image colours based on certain values

2007-09-03 Thread Roger Bivand
On Mon, 3 Sep 2007, Michal Gallay wrote: > Dear R Spatial Users, > > I have many DEM ASCII grid files and have produced maps(images) via > image(). The maps display e.g. slope angle, profile curvature for one area, > but calculated via different methods. > > I have searched R help, the R group, bu

[R-sig-Geo] Image colours based on certain values

2007-09-03 Thread Michal Gallay
Dear R Spatial Users, I have many DEM ASCII grid files and have produced maps(images) via image(). The maps display e.g. slope angle, profile curvature for one area, but calculated via different methods. I have searched R help, the R group, but I couldn't find out how to make R use certain col

Re: [R-sig-Geo] polygon buffers?

2007-09-03 Thread Roger Bivand
On Sun, 2 Sep 2007, Peter Adler wrote: > Dear R gurus, > > I am very excited about all the spatials tools in R because they have > almost liberated me from ESRI products. One of the last things I have > yet to figure out how to do in R is to create buffers around polygons > (or just expand polygon

Re: [R-sig-Geo] geoR Beta Estimates Not Equal to lm Coefficients: Why?

2007-09-03 Thread Paulo Justiniano Ribeiro Jr
Josha If I've got oyur question correctly the diference is because geoR is estimating both, regression coeficientes and covariance parameters and therefore the estimates ar not the same as lm() which uses ordinary least squares. In other words the regression parameters on geoR are estimated consid

Re: [R-sig-Geo] polygon buffers?

2007-09-03 Thread Paulo Justiniano Ribeiro Jr
Hi Agustin The short answer is not. However this mechanism in somewhat in the plans in something we've called temporalilly "myR" in the sense of R from my application. The "inners" would use the same mecanism and possibilities are to add R capabilities in a customized TerraView and/or call R dire

Re: [R-sig-Geo] polygon buffers?

2007-09-03 Thread Barry Rowlingson
Agustin Lobo wrote: > I dream with a GIS tool (A GIS display tool for R? An R plugging for > Qgis? etc) > that could display spatial R objects. This is beyond current > tools, based on exporting (hence duplicating space and troubles) > R objects to other formats. Oooh, you are giving me ideas!