pylawr.transform

• pylawr.transform.attenuation
• pylawr.transform.filter
• pylawr.transform.inference
• pylawr.transform.spatial
• pylawr.transform.temporal

pylawr.transform.memorymixin.MemoryMixin()	Abstract base class for dynamic filters (e.g.
pylawr.transform.transformer.Transformer()	Abstract base class for transformers, which apply filters or other operations on RadarField

pylawr.transform.memorymixin.MemoryMixin

class pylawr.transform.memorymixin.MemoryMixin

Bases: ABC

Abstract base class for dynamic filters (e.g. static clutter or noise is dependent of the recent states)

_abc_impl = <_abc._abc_data object>

static _get_time(array, time_obj=None)

Get the time from array or given time_obj.

Parameters

• array (array-like) – The linear reflectivity \(Z\)

• time_obj (datetime.datetime, numpy.datetime64 or None) – The time array was recorded. If None, the time will be determined from array.time, if available, otherwise it will be set to datetime.datetime.now. Default is None.

Returns

time_obj – The time from given time_obj or determined automatically as numpy.datetime64 object.

Return type

numpy.datetime64

abstract fit(*args, **kwargs)

Fit the filter to a new state

abstract property fitted

classmethod from_xarray(ds)

Create a filter from a given parameters dataset.

Parameters

ds (xarray.Dataset) – a filter parameters dataset

Returns

the filter with the specified parameters

Return type

Filter

reset()

Reset the trainable values of this filter. The trainable values will be set to their default value.

set_xr_params(ds)

The parameters from an xarray dataset are read and converted into attributes of this filter.

Parameters

ds (xarray.Dataset) – the filter parameters

abstract to_xarray()

Serialize this filter’s parameters to an xarray.Dataset

Returns

the filter’s parameters as dataset

Return type

xarray.Dataset

pylawr.transform.transformer.Transformer

class pylawr.transform.transformer.Transformer

Bases: ABC

Abstract base class for transformers, which apply filters or other operations on RadarField

_abc_impl = <_abc._abc_data object>

abstract transform(array, grid=None, *args, **kwargs)

Transform a given array with an optional grid according to the parameters.

Parameters

• array (xarray.DataArray) – The array to operate on.

• grid (child of pylawr.grid.base.BaseGrid, optional) – The grid to use. If left unspecified, array.lawr.grid is used.

• args (sequence) – Further positional arguments

• kwargs (dict) – Further keyword arguments

Returns

The transformed array

Return type

xarray.DataArray