[lunix.wgrib]Tricks4wgrib
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2008-03-01
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6/04 Tricks for wgrib
Every once in a while, someone requests that I add some feature
to wgrib. Usually I say no because I'm lazy. I then give the
excuse that feature is already available with a bit of UNIX trickery.
(1) How do I convert the entire file to binary? ..................................................... 2
(2) How do I get a verbose listing of the 20th record only? ................................... 2
(3) How do I extract the 20th and 30th records? ................................................. 2
(4) How do I extract the first 10 records as a grib file? ......................................... 2
(5) How do I extract the records on or after April 15, 1998?.................................. 3
(6) How do I extract the 500 Heights from a file (grib->grib)?............................... 3
(7) How do I eliminate the 500 Heights from a file (grib->grib)?............................ 4
(8) How do I extract the winds and temperatures from a file (grib->grib)? .............. 4
(9) How do I extract the winds and temperatures from a file and get a ................... 4
specific order? ................................................................................................ 4
(10) How many records does this file have?........................................................ 4
(11) What is the range of values in this file? ....................................................... 5
(12) How do I do a file transpose (rearrange the order) ? ..................................... 5
(13) My grib file has junk at the start/end. How do I get rid of it? .......................... 5
(14) Don't forget that you can 'cat' grib files. That gives you another .................... 5
(15) My grib file has same data on different grids. How do I filter.......................... 5
(16) I execute the following commands to extract TMP, and HGT to ....................... 6
separate files. Can I make if faster. ................................................................... 6
(17) My file is using ECMWF parameter table xxx which is not built into .................. 7
wgrib. What should be done? ........................................................................... 7
(18) Can wgrib write the decoded GRIB file to stdout? Right now .......................... 7
I create a temporary file (dump) which is read by another .................................... 7
program. Instead I would like to do .................................................................. 7
(19) I want an inventory in my format. Should I send you my modifications........... 8
to wgrib? If you add a new feature such as ECMWF ensemble information,............. 8
I'll consider adding the code to wgrib. However, if you are simply ......................... 8
rearranging the order of the data, it is doubtful that I'll include.............................. 8
your modifications........................................................................................... 8
(20) I want convert the very verbose (-V) into an inventory................................10
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