temporian.EventSet.isnan

isnan() -> EventSetOrNode

Returns boolean features, True in the NaN elements of the EventSet.

Note that for int and bool this will always be False since those types don't support NaNs. It only makes actual sense to use on float (or tp.float32) features.

See also evset.notnan().

Example

>>> a = tp.event_set(
...     timestamps=[1, 2, 3],
...     features={"M":[np.nan, 5., np.nan], "N":  [-1, 0, 5]},
... )
>>> b = a.isnan()
>>> b
indexes: ...
        'M': [ True False True]
        'N': [False False False]
...

>>> # Count nans
>>> b["M"].cast(int).cumsum()
indexes: ...
        timestamps: [1. 2. 3.]
        'M': [1 1 2]
...

Returns:

Type	Description
EventSetOrNode	EventSet with boolean features.