Modify variable by longitude

Hi NCL'ers,

I'm attempting to read in all the variables from a met_em.d01 file and write
all of them to a new met_em.d01 file with the exception of a variable,
SEAICE, which will need to be modified before being written to the new file.

The variable, SEAICE, contains data between 0.0 - 1.0. The constraints are
that the variable will not need to be changed between longitudes (-135 -
-179) and (170 - 179). The negative longitudes are West and positive
longitudes are East. The remainder longitudes (-134 - 0 & 0 - 169) will need
to be modified for values between 0-0.49 and 0.50-1.

Attached are the contents of the met_em.d01 file.

-------------------------------------------------------------
Brandon Fisel

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