On Fri, Jun 28, 2013 at 1:41 AM, Shane Carey <careys...@gmail.com> wrote: > Hi Michael, > > I tried this but it would not work. I get an error stating that x cell > sizes are not regular. > Any ideas? >
The function is reporting that your data don't fall on a grid, you'll need to figure out why that is the case, or if it is not the case why you think it should be (plotting the points is a good start). rasterFromXYZ has some arguments for controlling the tolerance of numeric error for the grid interpretation (tables or coordinates stored in text are a bad way to store such data, since you can introduce innacuracies in the coordinate values and the vast majority of them are redudant if it's really a grid). The function's help also points you to rasterize() which is for converting irregular data to a grid, but this is a very broad and complicated modelling topic, depending on your domain. I would trace the origins of your file back to where it's supposed to be a real grid and demand a decent raster format that is efficient and unambiguous before exploring that. R-Sig-Geo is a mailing list more suited to this topic, and is where the geo-geeks hang out. You should review the guidelines for that mailing list (and this one). Cheers, Mike. > > > > On Thu, Jun 27, 2013 at 12:40 PM, Michael Sumner <mdsum...@gmail.com> wrote: >> >> On Wed, Jun 26, 2013 at 12:53 AM, Shane Carey <careys...@gmail.com> wrote: >> > Hi, >> > >> > I have a data set consisting of XYZ data. the dimensions are 22427 rows >> > by >> > 3 columns. >> > >> > I try to use rasterFromXYZ from the raster package but I get the >> > following >> > error: >> > >> > Error in rasterFromXYZ(DATA) : x cell sizes are not regular >> > >> > Any help would be appreciated. >> >> No problem. >> >> library(raster) >> ?rasterFromXYZ >> >> >> > >> > Thanks >> > >> > -- >> > Shane >> > >> > [[alternative HTML version deleted]] >> > >> > ______________________________________________ >> > 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. >> >> >> >> -- >> Michael Sumner >> Hobart, Australia >> e-mail: mdsum...@gmail.com > > > > > -- > Shane -- Michael Sumner Hobart, Australia e-mail: mdsum...@gmail.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.