Need help with scrip for plotting isohyets on rainfall map

[Marcel Belmont]

Dear All,
I am relatively new to R and I am asking for
your assistance regarding producing an R script. I would like to have
R draw isoyhets (contour lines) on the map of Mahe which is the main
island in the Seychelles. I intend to produce a monthly weather review
that will include a rainfall map with contour lines drawn. I have
attached the map and coordinates of the rainfall stations together
with a column containing daily rainfall from those stations to be used
as an example. Thanking you in advance for your help.


Regards,


M.Belmont

[Dennis Murphy]

Hi:

For reading the data from Excel into R, see the XLConnect package,
which comes with a nice vignette. For contour plots in ggplot2, see
http://docs.ggplot2.org/current/stat_contour.html, which contains a
number of examples. Pay attention to how the data must be arranged for
input into ggplot2.

Dennis

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