Add example netcdf file and R code

[vsimko]

This file from our server:
GT_SSD-L2-SEVIR_LST_2-20130725_120000-LIPM-0.05X0.05-V1.0.nc

And the R code, something like:

library(ncdf4)

# load the netcdf file to R
ncfile <- nc_open("path/to/the/nc/file")

# extract known layers
lst <- ncvar_get(ncfile, "LST")
lat <- ncvar_get(ncfile, "lat")
lon <- ncvar_get(ncfile, "lon")

# get the extremes
min(lst, na.rm = TRUE) - 273.15
max(lst, na.rm = TRUE) - 273.15

# show a very simple "heatmap"
image(lst)

# convert to a data frame
data <- data.frame(lat = as.vector(lat),
                   lon = as.vector(lon),
                   lst = as.vector(lst) - 273.15)