I have two netcdf files: 1) BB_001.nc with 337 records with record variable as time; 2) BB_002.nc which is continuation of the simulation with 385 records (record variable is also time). Therefore, these two files have one overlap record.
$ ncdump -h BB_001.nc
netcdf BB_WC {
dimensions:
nele = 278399 ;
node = 143546 ;
siglay = 18 ;
siglev = 19 ;
three = 3 ;
time = UNLIMITED ; // (337 currently)
DateStrLen = 26 ;
maxnode = 11 ;
maxelem = 9 ;
four = 4 ;
...
$ ncdump -h BB_002.nc
netcdf BB_0001 {
dimensions:
nele = 278399 ;
node = 143546 ;
siglay = 18 ;
siglev = 19 ;
three = 3 ;
time = UNLIMITED ; // (385 currently)
DateStrLen = 26 ;
maxnode = 11 ;
maxelem = 9 ;
four = 4 ;
...
I want to append them but the last record of BB_001.nc and first record of BB_002.nc is the same and I need to delete the redundant record.
I tried the following command:
ncks –A –d time,1,385 BB_002.nc BB_001.nc
But it did not work and records of BB_001.nc is still the same (337 instead of 337+384=721).
Alternatively, I tried:
ncrcat BB_001.nc BB_002.nc test.nc
Is works but test.nc has 722 records. How can I get rid of the redundant record?
$ ncdump -h test.nc
netcdf test {
dimensions:
nele = 278399 ;
node = 143546 ;
siglay = 18 ;
siglev = 19 ;
three = 3 ;
time = UNLIMITED ; // (722 currently)
DateStrLen = 26 ;
maxnode = 11 ;
maxelem = 9 ;
four = 4 ;
Any help is very much appreciated.
Thanks,
Ordinarily people do this in two steps as above, e.g.,
ncks -d time,1, BB_002.nc 2.nc
ncrcat BB_001.nc 2.nc out.nc
People who read the http://nco.sf.net/nco.html are aware of the --record_append option which allows this to be done in one step, i.e., faster. Exercise left for reader.