Introduction

The -not option selects records which should be processed. The -not is a not -match. When multiple -match/-not options are used, all must be satisfied.

    wgrib2 -not X (...)

is the same as 

    wgrib2 -match_inv file | egrep -v X | wgrib2 -i (...)



    wgrib2 -match X  -not Y (...)

is the same as 

    wgrib2 -match_inv file | egrep X | egrep -v Y | wgrib2 -i (...)

where X, and Y are regular expressions.  Note, X and Y will not match 
the second (byte location) field of the short inventory.

Usage

-match X

X is a POSIX extended regular expression

The -match, and -not selection facility is more limited than the "wgrib2 | filter | wgrib2 -i" syntax. However, it can be more efficient especially when combined with the -end option.

See also: -not, -match_inv, -end, -i. -if.