M3-package              Functions to read in and manipulate air quality
                        model output from files in Models3 format
combine.date.and.time   Combine date and time to obtain date-time in
                        POSIX format
decipher.M3.date        Decipher Models3 date format (YYYYDDD) into R's
                        Date class.
decipher.M3.time        Decipher Models3 time format (HHMMSS) into
                        hours, minutes, and seconds.
get.M3.var              Read in variable values from Models3-formatted
                        files
get.canusamex.bds       Obtain map boundaries for Canada, USA, and
                        Mexico
get.coord.for.dimension
                        Get the grid coordinates for the grid rows or
                        columns.
get.datetime.seq        Read in a sequence of date-time steps from a
                        Models3-formatted file.
get.grid.info.M3        Get information about the grid used by the air
                        quality model
get.map.lines.M3.proj   Get map lines in the model projection units
get.matrix.all.grid.cell.ctrs
                        Obtain a matrix giving the locations of the
                        grid cell centers
get.proj.info.M3        Obtain information about the projection used in
                        the Models3 file
project.M3.1.to.M3.2    Project coordinates based on projection in the
                        first file to the projection given in the
                        second
project.M3.to.lonlat    Project coordinates from model units to
                        longitude/latitude
project.lonlat.to.M3    Project coordinates from longitude/latitude to
                        model units.
var.subset              Subset the array resulting from a call to
                        'get.M3.var'.
