Thanks that makes sense. Just a newby to spatial data in R. Thanks.
Roger Bivand wrote: > > First re-read the definition of what a SpatialPixels object is - > ?"SpatialPixels-class" - note that it says: "class for defining a pixels, > forming a possibly incomplete rectangular grid of arbitrary dimension". > When you try to coerce a SpatialPointsDataFrame to a > SpatialPixelsDataFrame, it is checked to see that the points form a > "possibly incomplete rectangular grid". Your points are random within a > 1,10 square, so only regularly spaced for a very special setting of the > seed of the RNG, right? Since you are unlikely to hit that very, very rare > seed at random, you are not likely to generate a regular grid in this way. > Did you examine the class(), summary() and str() of the input data in the > examples? > > Hope this helps, > > Roger Bivand > > PS. consider following this up on the R-sig-geo list. > > > Paul Heinrich Dietrich wrote: >> >> This seems pretty basic, but I can't get any data to work except for the >> documented examples. When the goal is to get to SpatialPixels, here is >> what I see... >> >>> x <- runif(10,1,10) >>> y <- runif(10,1,10) >>> z <- rnorm(10,0,1) >>> MyData <- as.data.frame(cbind(x,y,z)) >>> library(gstat) >>> coordinates(MyData) <- ~x + y >>> gridded(MyData) <- TRUE >> suggested tolerance minimum: 0.893182669294186 >> Error in points2grid(points, tolerance, round, fuzz.tol) : >> dimension 1 : coordinate intervals are not constant >> >> I've spent way too much time trying to get my data to work. Please help. >> Thanks. >> > > -- View this message in context: http://www.nabble.com/How-to-use-your-own-data-in-gstat-and-sp--tp24994744p25004653.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
