foundryts.functions.skip_nonfinite

foundryts.functions.skip_nonfinite()

Returns a function that filters all points with non-finite values in a time series.

Non-finite values can be inf or NaN.

• Returns: A function that accepts a single time series and returns the filtered time series with only finite point values.
• Return type: (FunctionNode) -> FunctionNode

Dataframe schema

Examples

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>>> series = F.points(
...     (100, 100.0),
...     (120, float("nan")),
...     (130, 230.0),
...     (166, float("inf")),
...     (167, 366.0),
...     (168, float("-inf")),
...     name="series",
... )
>>> series.to_pandas()
                      timestamp  value
0 1970-01-01 00:00:00.000000100  100.0
1 1970-01-01 00:00:00.000000120    NaN
2 1970-01-01 00:00:00.000000130  230.0
3 1970-01-01 00:00:00.000000166    inf
4 1970-01-01 00:00:00.000000167  366.0
5 1970-01-01 00:00:00.000000168   -inf

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>>> finite_series = F.skip_nonfinite()(series)
>>> finite_series.to_pandas()
                      timestamp  value
0 1970-01-01 00:00:00.000000100  100.0
1 1970-01-01 00:00:00.000000130  230.0
2 1970-01-01 00:00:00.000000167  366.0