[R] creating functions in R

[Oarabile Ruth Molaodi]

I am trying to learn how to create my own function in R. I want to 
create a function that can plot the polygons/regions/map given the 
coordinates of each region. The function should be able to colour the 
poplygons according to the data supplied ,for examples the means or 
rates of disease at a region/polygon.

your advise will be highly appreciated.

Thanks in advance for your help.

Oarabile