isna
forge.tafunctionSince Forge API 1
Signaturepython
forge.ta.isna(x: ArrayLike | float | None) -> np.ndarray[Any, np.dtype[np.bool_]] | boolTrue where a value is missing: None or NaN.
Parameters
| Name | Type |
|---|---|
| x | ArrayLike | float | None |
An array gives an array of the same shape. Boolean and integer arrays carry no
missing value (contract C3 section 2), so they give all False.