mean_and_std : field mean and standard deviation

Computes field mean value and field standard deviation using CDO operators fldmean and fldstd, and discarding lat/lon coordinates from CDO output

References :

Provider / contact : climaf at meteo dot fr

Inputs (in the order of CliMAF call):
  • any dataset (but only one)

Mandatory arguments:

Optional arguments:
  • var : name of the input variable ; used to provide a meaningful name for output std, namely std($varin). CliMAF will take care of providing this argument automatically if needed.
Outputs :
  • main output : field mean
  • secondary outputs and their names :
    • std : field standard deviation

Climaf call example

>>> ds= .... #some dataset, with whatever variable
>>> m=mean_and_std(ds)  # m receives the field mean
>>> dev=m.std           # dev receives operator output named "std", namely the field standard deviation

Side effects : create temporary files in the directory provided for output fields

Implementation : just two calls to cdo and the use of ncwa for discarding degenerated space dimensions (because CDO does not discard them)