movingpandas.Trajectory.add_acceleration#
- Trajectory.add_acceleration(overwrite=False, name='acceleration', units=(None, None, None, None))#
Add acceleration column and values to the trajectory’s DataFrame.
Acceleration values are computed between the current point and the previous:
If no units have been declared:
For geographic projections, in meters per second squared
For other projections, in CRS units per second squared
If units have been declared:
For geographic projections, using declared units
For known CRS units, using declared units
For unknown CRS units, using declared units as if CRS distance units are meters
If only distance units are declared, returns distance per second squared
If distance and one time unit declared, returns distance/time per second
- Parameters:
overwrite (bool) – Whether to overwrite existing speed values (default: False)
name (str) – Name of the acceleration column (default: “acceleration”)
units (tuple(str)) –
Units in which to calculate acceleration
- distancestr
Abbreviation for the distance unit (default: CRS units, or metres if geographic)
- timestr
Abbreviation for the time unit (default: seconds)
- time2str
Abbreviation for the second time unit (default: seconds)
For more info, check the list of supported units at https://movingpandas.org/units
Examples
If no units are declared, the acceleration will be calculated in meters per second squared for geographic projections and in CRS distance units per second squared for all other projections
>>>traj.add_acceleration()
The default column name is “acceleration”. If a column of this name already exists, a new column name can be specified
>>>traj.add_acceleration(name=”acceleration (CRS units/s2)”)
If units are declared, acceleration will be calculated in those units except if the CRS distance units are unknown, in which case the CRS distance units are assumed to be meters
>>>traj.add_acceleration(units=(“km”, “h”, “s”))
It is suggested to declare a name for the new column specifying units
>>>traj.add_acceleration(name=”US Survey Feet/s2”, units=(“survey_ft”, “s”)) >>>traj.add_acceleration(name=”mph/s”, units=(“mi”, “h”, “s”))