plot data on base of lon&lat

I don't completely understand your question, but is it perhaps that
west longitude is often represented as negative?

Otherwise, please provide a reproducible example, using data from the
cogizam package if you'd like, or at least a clear guide to where
you've found this example and how it differs from your own data.

Sarah

Hi groups


i want plot of phytoplankton density on base of Lon & lat, as same as
the description on the cozigam package.

but the main problem is the form of matrix Lon parameters in the example
on eggdata that is negative ,how changed the longitude to this form ?

thanks all



Mahnaz

Sarah Goslee
http://www.functionaldiversity.org