xcube resample


Resample data along the time dimension.

$ xcube resample --help
Usage: xcube resample [OPTIONS] CUBE

  Resample data along the time dimension.

  -c, --config CONFIG             xcube dataset configuration file in YAML
                                  format. More than one config input file is
                                  allowed.When passing several config files,
                                  they are merged considering the order passed
                                  via command line.
  -o, --output OUTPUT             Output path. Defaults to 'out.zarr'.
  -f, --format [zarr|netcdf4|mem]
                                  Output format. If omitted, format will be
                                  guessed from output path.
  --variables, --vars VARIABLES   Comma-separated list of names of variables
                                  to be included.
  -M, --method TEXT               Temporal resampling method. Available
                                  downsampling methods are 'count', 'first',
                                  'last', 'min', 'max', 'sum', 'prod', 'mean',
                                  'median', 'std', 'var', the upsampling
                                  methods are 'asfreq', 'ffill', 'bfill',
                                  'pad', 'nearest', 'interpolate'. If the
                                  upsampling method is 'interpolate', the
                                  option '--kind' will be used, if given.
                                  Other upsampling methods that select
                                  existing values honour the '--tolerance'
                                  option. Defaults to 'mean'.
  -F, --frequency TEXT            Temporal aggregation frequency. Use format
                                  "<count><offset>" where <offset> is one of
                                  'H', 'D', 'W', 'M', 'Q', 'Y'. Use 'all' to
                                  aggregate all time steps included in the
                                  dataset.Defaults to '1D'.
  -O, --offset TEXT               Offset used to adjust the resampled time
                                  labels. Uses same syntax as frequency. Some
                                  Pandas date offset strings are supported as
  -B, --base INTEGER              For frequencies that evenly subdivide 1 day,
                                  the origin of the aggregated intervals. For
                                  example, for '24H' frequency, base could
                                  range from 0 through 23. Defaults to 0.
  -K, --kind TEXT                 Interpolation kind which will be used if
                                  upsampling method is 'interpolation'. May be
                                  one of 'zero', 'slinear', 'quadratic',
                                  'cubic', 'linear', 'nearest', 'previous',
                                  'next' where 'zero', 'slinear', 'quadratic',
                                  'cubic' refer to a spline interpolation of
                                  zeroth, first, second or third order;
                                  'previous' and 'next' simply return the
                                  previous or next value of the point. For
                                  more info refer to
                                  scipy.interpolate.interp1d(). Defaults to
  -T, --tolerance TEXT            Tolerance for selective upsampling methods.
                                  Uses same syntax as frequency. If the time
                                  delta exceeds the tolerance, fill values
                                  (NaN) will be used. Defaults to the given
  -q, --quiet                     Disable output of log messages to the
                                  console entirely. Note, this will also
                                  suppress error and warning messages.
  -v, --verbose                   Enable output of log messages to the
                                  console. Has no effect if --quiet/-q is
                                  used. May be given multiple times to control
                                  the level of log messages, i.e., -v refers
                                  to level INFO, -vv to DETAIL, -vvv to DEBUG,
                                  -vvvv to TRACE. If omitted, the log level of
                                  the console is WARNING.
  --dry-run                       Just read and process inputs, but don't
                                  produce any outputs.
  --help                          Show this message and exit.


Upsampling example:

$ xcube resample --vars conc_chl,conc_tsm -F 12H -T 6H -M interpolation -K linear examples/serve/demo/cube.nc

Downsampling example:

$ xcube resample --vars conc_chl,conc_tsm -F 3D -M mean -M std -M count examples/serve/demo/cube.nc

Python API

The related Python API function is xcube.core.resample.resample_in_time().