Dear all, I got a couple of warnings using panel.levelplot.raster,
In panel.levelplot.raster(..., interpolate = TRUE) : 'y' values are not equispaced; output will be wrong although I was quite sure my data were equally spaced (indeed, I created them with seq()). A closer look at the source code reveals that the function tests for exact uniformity in grid spacing, if (length(unique(diff(uy))) != 1) warning("'x' values are not equispaced; output will be wrong") The following dummy example would suggest that a strict equality is not always suitable, x <- seq(0, 50, length=100) ux <- sort(unique(x[!is.na(x)])) length(unique(diff(ux))) # 8 sd(unique(diff(ux))) # 2.462951e-15 Suggestions / comments are welcome. Best regards, baptiste sessionInfo() R version 2.11.0 RC (2010-04-16 r51754) i386-apple-darwin9.8.0 locale: [1] en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] lattice_0.18-5 loaded via a namespace (and not attached): [1] grid_2.11.0 tools_2.11.0 -- ____________________ Baptiste Auguié Departamento de Química Física, Universidade de Vigo, Campus Universitario, 36310, Vigo, Spain tel: +34 9868 18617 http://webs.uvigo.es/coloides ______________________________________________ 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.