[R] Isolines in vector format

[Ben Bolker]

Antonio Rodriges <antonio.rrz <at> gmail.com> writes:

> I am working with netcdf data of NCEP/NCAR Climate Reanalysis. R does
> have capability to draw isolines using "contour". However, I need not
> to draw but  to export contours in any vector format. Is it possible?

  See

?contourLines

(you will have to write a little bit of code to export the
values, which are stored as a list of contours, to a file:
see e.g. ?write)