[R] how to plot gridded data

[Bert Gunter]

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 <chocold12 using 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.pikal using 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-bounces using r-project.org> On Behalf Of lily li
> > > Sent: Wednesday, September 12, 2018 8:55 AM
> > > To: R mailing list <r-help using 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 using 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 using 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.