Re: [netcdfgroup] binary larger than text file

• To: Benoist LAURENT <benoist.laurent@xxxxxxx>, <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdfgroup] binary larger than text file
• From: "Larry D. Oolman" <ldoolman@xxxxxxxx>
• Date: Thu, 8 Oct 2015 20:56:19 -0600

I am not completely familiar with the changes from netCDF 3 to netCDF 4 but I
believe the 'string' type is a variable length string.  It looks to me as if
you are putting one character in each string, the LenRecord is not needed.
This would probably require storage of a pointer of perhaps 8 bytes and a
string length (of value 1) of perhaps another 8 bytes to define each
character, increasing the size of the file by about a factor of 17.

What you probably want is either a character type:
  char record(Natoms, LenRecord) ;
or a string type without the length of the string specified:
  string record(Natoms) ;

On 10/07/15 07:45, Benoist LAURENT wrote:

Dear netcdf users,

I have data I want to convert to nc format.
This data is integers, floating point numbers and text.

I created a dummy nc file containing text and I realize the binary file is 
larger that the text file.
How come ?

See by yourself: convert the joint file to binary using
ncgen -b foo.nc.txt

Thank you in advance for your help.
Ben



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--
Larry Oolman
Department of Atmospheric Science
University of Wyoming
Dept. 3038, 1000 E. University Ave.
Laramie, WY 82071
ldoolman@xxxxxxxx
http://www.uwyo.edu/atsc

• References:
  • [netcdfgroup] binary larger than text file
    • From: Benoist LAURENT