For example, if monthly data is input, monthly data will be output. The argument to -i is the input directory. The argument to -o is the output directory, which is created as necessary. The argument to -v is the name of the variable to be filtered in the netcdf file. The argument to -t is a tag that can be used to select files within the input directory.
Tag is a regular expression.
Default tag is '. The cpio and tar files must contain only netcdf files that are to be filtered. A script, described below , is available to generate filters in this namelist format. The output files preserve record axes of their corresponding input files, as long as the input record axis lies within the filter window. 29 Notice that files 1.slp.nc and 5.slp.nc are not included on output, and that the first record from 2.slp.nc and the last record from 4.slp.nc have been dropped.