mirror/netcdf-c
2
0
Fork 0
mirror of https://github.com/Unidata/netcdf-c.git synced 2025-01-18 15:55:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

Make variable easier to compress

Browse Source 
Make the data in the variable `var1` easier to compress so that the compression tests will be more robust.  The zlib_ng library, for example, at level 1 does not compress a sequence of integers very well which resulted in the NetCDF-4 compressed file being larger than the uncompressed NetCDF-3 file.  With the change above, the variable contains `0,0,0,1,1,1,2,2,2,...,` which compresses at level 1 and the compression test is more robust.
This commit is contained in:
Greg Sjaardema 2021-08-05 07:52:50 -06:00 committed by GitHub
parent 84f0696e7d
commit c3f20c88e9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
ncdump/tst_compress.c
View File

@ -36,7 +36,7 @@ main(int argc, char **argv) { /* create a compressible file, for testing */
if (nc_def_var(ncid, "var1", NC_INT, VAR1_RANK, var1_dims, &varid)) ERR;
if (nc_enddef (ncid)) ERR;
for(i=0; i < DIM1_LEN; i++) {
var1_data[i] = i;
var1_data[i] = i / 3;
}
if (nc_put_var(ncid, varid, var1_data)) ERR;
if (nc_close(ncid)) ERR;
@ -47,7 +47,7 @@ main(int argc, char **argv) { /* create a compressible file, for testing */
if (nc_def_var(ncid, "var1", NC_INT, VAR1_RANK, var1_dims, &varid)) ERR;
if (nc_enddef (ncid)) ERR;
for(i=0; i < DIM1_LEN; i++) {
var1_data[i] = i;
var1_data[i] = i / 3;
}
if (nc_put_var(ncid, varid, var1_data)) ERR;
if (nc_close(ncid)) ERR;