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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>.