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SYNOPSIS
ncstat [-d dim1,dim2,...] [-s s1,s2,...] [-f attname] [-h attname] [-n] in_cdf out_cdf
DESCRIPTION
Computes a statistical summary of the input netCDF, in_cdf, and writes the result to the output netCDF, out_cdf. The set of desired statistics can be specified, as can the dimensions over which to compute them. The output netCDF will be created if an only if the program is successful.
OPTIONS
-d dim1[,dim2,...] Summary dimensions. The set of dimensions over which the summary statistics are to be computed is dim1[,dim2,...]. Statistics will only be computed for variables that contain at least one of the summary dimensions. The default is all input dimensions. -s s1[,s2,...] The set of statistics to compute is s1[,s2,...]. Each output variable will be named after its respective input variable and the statistic that it represents: the first part will be the input variable name (e.g. "temp") and the last part will be an underscore followed by the statistic name (e.g. "_mean", yielding "temp_mean"). Except for the `fillcount' statistic, fill-values do not take part in the computations. Fill-values are indicated by the presence of a `_FillValue' variable-attribute (see, however, the `-f' option). The known statistics are: min Minimum value. The output variable will have the same type and attributes as the input variable. max Maximum value. Similar to `min' above. mean Mean value. If the type of the input variable is double, then the type of the output variable will also be double; otherwise the type of the output variable will be float. The output variable will have the same attributes as the input variable. fillcount Count of the number of fill-values. The type of the output variable will be long. The default is all statistics. -f attname The name of the fill-value attribute in the input netCDF. The default is `_FillValue'. is `history'. -n Do not create a `history' global-attribute in the output netCDF.
EXAMPLES
FILES
out_cdf.pid.seq Temporary output netCDF: where pid is the process-ID and seq is a sequence number. If all goes well, the temporary output netCDF will be renamed to the requested output netCDF.
SEE ALSO
netcdf(1).
DIAGNOSTICS
BUGS
The constructed, temporary output netCDF specification might be too long on some systems (the program checks for this).
MAINTAINER
Steve Emmerson <semmerson@unidata.ucar.edu>.