Sorry for the emails, I just wanted to have an example. layer$z 1 1 3 4 6 2 2 3 4 1 2 9 1 4 5 2 1 8
How to convert the matrix to layer$z = c(1, 4, 5, 2, 1, 8, 2, 3, 4, 1, 2, 9, 1, 1, 3, 4, 6, 2)? I think this vector is the order that levelplot can use. Thanks again. On Mon, Jan 15, 2018 at 10:58 PM, lily li <chocol...@gmail.com> wrote: > Hi Bert, > > I think you are correct that I can use levelplot, but I have a question > about converting data. For example, the statement: > levelplot(Z~X*Y), Z is row-wise from the lower left corner to the upper > right corner. > My dataset just have gridded Z data as a txt file (or can be called > matrix?), how to convert them to the vector in order for levelplot to use? > Thanks. > > On Mon, Jan 15, 2018 at 6:04 PM, Bert Gunter <bgunter.4...@gmail.com> > wrote: > >> From your description, I am **guessing** that you may not want a "spatial >> map" (including projections) at all, but rather something like a level >> plot. See ?levelplot in the lattice package for details. Both I am sure >> ggplot2 has something similar. >> >> Apologies if I havemisunderstood your intent/specifications. >> >> Cheers, >> Bert >> >> >> Bert Gunter >> >> "The trouble with having an open mind is that people keep coming along >> and sticking things into it." >> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) >> >> On Mon, Jan 15, 2018 at 4:54 PM, lily li <chocol...@gmail.com> wrote: >> >>> 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/posti >>> ng-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> > [[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.