Re: [ferret_users] List data incorrectly

["Ansley C. Manke" <ansley.b.manke@xxxxxxxx>]

Hi,

Yes, Ferret writes double precision data.

https://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/data-set-basics/BINARY-DATA

says,

Since Ferret represents all variables as REAL*8, it will read all data int 8-byte words. On writing data using the LIST/FORMAT=stream command, it writes data in 8-byte words.

As a side note, NetCDF is really Ferret's native file type.  When writing NetCDF, one can specify the output data type when writing out data, with the /OUTTYPE qualifier (/OUTTYPE is not a valid option for writing STREAM data).

Ansley

On 3/5/2019 8:38 AM, Boyin Huang - NOAA Federal wrote:

Dear Ferret users,

I tried to list data from a NetCDF file to a binary file using the following command:

use HadCRUT.4.6.0.0.anomalies.100.nc

list/file="HadCRUT.4.6.anm.100.dat"/format=stream/i=1:72/j=1:36/L=1/clobber temperature_anomaly

I suspect that the data were not saved correctly, since the size of the data file is 20736 rather than 10368.

Is ferret writing double precision data?

Ferret version:

        NOAA/PMEL TMAP

        FERRET v6.93

        Linux 2.6.32-504.el6.x86_64 64-bit - 11/13/14

         5-Mar-19 11:36

Linux version:

Linux ersst-prod.ncdc.noaa.gov 2.6.32-042stab108.2 #1 SMP Tue May 12 18:07:50 MSK 2015 x86_64 x86_64 x86_64 GNU/Linux

Thanks a lot.

-- 

Boyin Huang, Room-468
NOAA/NCEI/CCOG
Asheville, NC.
828-271-4851