wgrib2: -not_if
Introduction
The -not_if option returns true or false and is the start of the IF
block structure. The
-not_if option is like the
-if option except the results are reversed.
For example,
-if ':HGT:' is true if the match inventory contains the string ':HGT:', and
the next block is executed. The option -not_if ':HGT:' does the opposite
and does not execute the next block.
See -if for details about the IF block structure.
Usage
-not_if X
X is a regular expression
returns true if X is not in the match inventory, false otherwise
See also: -not,
-end,
-i,
-if,
-if_fs,
-match,
-match_inv,
-not_if_fs,
-fi.
-endif.
-else.
-set_regex.
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