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Dear List, I have examined the sp, maptools, and shapefiles packages (Windows) but cannot seem to figure out a solution for writing shapefiles for 'curvy shapes'. The scenario is that I generate a series of polygons, circles, and ellipses on...

if your dataframe is called foo, as.vector(foo) Quoting Christoph Scherber <Christoph.Scherber at uni-jena.de>: > Dear all, > > I have a data frame that looks like this: > > c1 c2 c3 > A B C > B C A > A A...

Hello, This is a seemingly simple task, but it has been frustrating me for too long, so I am turning to this list for some help. I have two vectors of factors which are quite long; two simple examples are...

Dear List, Running on a PC (Windows 2000) with 256 MB RAM, Version R1.9.1 I have a relatively simple problem, which I can solve for relatively small datasets, but run into difficulties with larger ones. I believe that...

Hello list members, I am working with simulated data for landscape pattern analysis. I have 1000 replicates of binary (2 colour) gridded landscapes at each combination of 9 levels of class proportion and 11 levels of spatial autocorrelation. The results...

Dear List, I have just compiled my first R library for submission to CRAN; however, I have a tiny problem with 'R CMD check' that is holding me back. I have read extensively the PDF document on Writing R Extensions...

Hello, I have a matrix [9,11] called tempmed from which I produce a perspective plot. I then indicate a point on the surface to which I want to drop a point using points() and trans3d(). The code is below...

This might help... Here KI is a matrix such as your dataset (without the flag) "dups" <- function (intab=KI) { # CREATE A MATRIX WITH ONLY THE UNIQUE ROWS OF intab intabunique <- unique(intab) # COLLAPSE THE FULL TABLE a2 <- apply(intab, 1...