numpy.log1p(arr, out = None, *, where = True, casting = 'same_kind', order = 'K', dtype = None, ufunc 'log1p') :
This mathematical function helps user to calculate
natural logarithmic value of x+1 where x belongs to all the input array elements.
log1p is reverse of exp(x) - 1.
Parameters :
array : [array_like]Input array or object.
out : [ndarray, optional]Output array with same dimensions as
Input array, placed with result.
**kwargs : allows you to pass keyword variable length of argument to a function.
It is used when we want to handle named argument in a function.
where : [array_like, optional]True value means to calculate the universal
functions(ufunc) at that position, False value means to leave the
value in the output alone.
Return :
An array with natural logarithmic value of x + 1;
where x belongs to all elements of input array.
Code 1 : Working
Output :
Input array : [1, 3, 5]
Output array : [ 0.69314718 1.38629436 1.79175947]
Code 2 : Graphical representation