xy_from_polar

xy_from_polar(magnitude, direction)

Converts vector data from meteorological polar representation to xy representation.

Parameters

magnitude (number, ndarray or Fieldset) – the speed/magnitude
direction (number, ndarray or Fieldset) – the meteorological direction of the vector in degrees

Return type

list or Fieldset or None

In polar representation the data is specified by two components:

magnitude: represents the speed/magnitude
direction: represents the meteorological direction of the vector in degrees (see direction() for explanation)

In the target xy representation the x axis points East while the y axis points North.

The type of the result depends on the type of the input data:

if the input is number the result is a list of two numbers
if the input is ndarray the result is a list of two ndarrays, the first ndarray contains the x components while the second ndarray the y components
if the input is Fieldset the result is a fieldset where an x component field is immediately followed by the corresponding y component field.

Note