Class GCxGC defines the superclass of two-dimensional comprehensive gas chromatographic data.
namethe name of a NetCDF file where the data will be retrieved from.
mod_timea integer with the modulation time for the second dimension.
The validity function evaluates if the provided file can be readed as a
NetCDF file. The validation function employs the function
open.nc to check if the provided file inherits to
the NetCDF class.