You may wish to consider posting on r-sig-geo, where you may be more likely to find expertise for this sort of thing. -- 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 Thu, Sep 13, 2018 at 7:08 PM lily li <chocol...@gmail.com> wrote: > > Hi Petr, > > I have merged the data using cbind. The dataset is like this: > DF > lat1_lon1 lat1_lon2 lat1_lon3 ... lat2_lon1 > 1.20 1.30 2.11 ... 1.28 > 1.50 1.81 3.12 ... 2.34 > 2.41 2.22 1.56 ... 2.50 > 3.11 4.21 2.12 ... 3.21 > > The other file is a shapfile, which I can open using readOGR. Then it shows > a polygon according to geographical latitude and longitude in degrees. How > to overlay the values in DF onto the polygon? note that DF has the > coordinates for a rectangular box that includes the shapefile, but is > larger. I don't know how to do this. Thanks for your help. > > On Wed, Sep 12, 2018 at 3:22 PM, PIKAL Petr <petr.pi...@precheza.cz> wrote: > > > Hi > > > > 1. Read files/lines into R ?read.table, ?read.lines > > 2. Merge files according to your specification ?merge, ?rbind > > 3. Plot values by suitable command(s) ?plot, ?ggplot > > 4. If you want more specific answer, please post more specific question, > > preferably with concise and clear example. > > 5. Avoid posting in HTML > > > > Cheers > > Petr > > > > > -----Original Message----- > > > From: R-help <r-help-boun...@r-project.org> On Behalf Of lily li > > > Sent: Wednesday, September 12, 2018 8:55 AM > > > To: R mailing list <r-help@r-project.org> > > > Subject: [R] how to plot gridded data > > > > > > Hi R users, > > > > > > I have a question about plotting gridded data. I have the files > > separately, but do > > > not know how to combine them. For example, each txt file has daily > > > precipitation data at a specific grid cell, named pr_lat_lon.txt. How to > > plot all > > > txt files for one surface (which is rectangular in this case), or how to > > combine > > > the txt files together? Thanks. > > > > > > [[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. > > Osobní údaje: Informace o zpracování a ochraně osobních údajů obchodních > > partnerů PRECHEZA a.s. jsou zveřejněny na: https://www.precheza.cz/ > > zasady-ochrany-osobnich-udaju/ | Information about processing and > > protection of business partner’s personal data are available on website: > > https://www.precheza.cz/en/personal-data-protection-principles/ > > Důvěrnost: Tento e-mail a jakékoliv k němu připojené dokumenty jsou > > důvěrné a podléhají tomuto právně závaznému prohláąení o vyloučení > > odpovědnosti: https://www.precheza.cz/01-dovetek/ | This email and any > > documents attached to it may be confidential and are subject to the legally > > binding disclaimer: https://www.precheza.cz/en/01-disclaimer/ > > > > > > [[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. ______________________________________________ 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.