blosc2.log1p#

blosc2.log1p(ndarr: NDArray | NDField | C2Array | LazyExpr, /) → LazyExpr#

Return the natural logarithm of one plus the input array, element-wise.

Parameters:: ndarr¶ (NDArray or NDField or C2Array or LazyExpr) – The input array.
Returns:: out – A lazy expression that can be evaluated.
Return type:: LazyExpr

References

Examples

>>> import numpy as np
>>> import blosc2
>>> values = np.array([-0.9, -0.5, 0, 0.5, 0.9])
>>> ndarray = blosc2.asarray(values)
>>> result_lazy = blosc2.log1p(ndarray)
>>> result = result_lazy[:]
>>> print("Original values:", values)
Original values: [-0.9 -0.5  0.   0.5  0.9]
>>> print("Log1p (log(1 + x)):", result)
Log1p (log(1 + x)): [-2.30258509 -0.69314718  0.          0.40546511  0.64185389]