I think it may be feasible to transform the dataset DF, so that the column names lat_lon can be a surface, where the values locate at each surface. But I don't know how to transform DF.
On Fri, Sep 14, 2018 at 10:02 AM, 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/posti >> ng-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.