Hi Roman, Thanks for your reply. For the spatial coordinates layer, I just have coordinates of the upper left corner, numbers of rows and columns of the spatial map, and grid cell size. How to create a spatial layer of coordinates from this data? Thanks.
On Mon, Jan 15, 2018 at 3:26 PM, Roman Luštrik <roman.lust...@gmail.com> wrote: > You will need to coerce your data into a "spatial" kind, as implemented in > `sp` or as of late, `sf` packages. You might want to give the vignettes a > whirl before you proceed. > Roughly, you will have to coerce the data to Spatial* (you could go for a > point, raster or grid type, I think) and also specify the projection. Once > you have that, plotting should be handled by packages. > > Here are a few quick links that might come handy: > > https://cran.r-project.org/web/views/Spatial.html > http://www.datacarpentry.org/R-spatial-raster-vector- > lesson/10-vector-csv-to-shapefile-in-r/ > > > Cheers, > Roman > > On Mon, Jan 15, 2018 at 11:22 PM, lily li <chocol...@gmail.com> wrote: > >> Hi users, >> >> I have no clear clue about plotting spatial data. For example, I just >> have a table with attribute values of each grid cell, such as elevation. >> Then I have coordinates of the upper left corner in UTM, the number of rows >> and columns, and grid cell size. How to create spatial plot of elevations >> for the grid cells, in color ramp? Should I create a spatial grid layer >> with all the polygons first? Thanks. >> >> -- >> -- >> You received this message because you are subscribed to the ggplot2 >> mailing list. >> Please provide a reproducible example: https://github.com/hadley/devt >> ools/wiki/Reproducibility >> >> To post: email ggpl...@googlegroups.com >> To unsubscribe: email ggplot2+unsubscr...@googlegroups.com >> More options: http://groups.google.com/group/ggplot2 >> >> --- >> You received this message because you are subscribed to the Google Groups >> "ggplot2" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to ggplot2+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > In God we trust, all others bring data. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
