numpy.floor — NumPy v1.13 Manual (original) (raw)

numpy. floor(x, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, _subok=True_[, signature, _extobj_]) = <ufunc 'floor'>¶

Return the floor of the input, element-wise.

The floor of the scalar x is the largest integer i, such that_i <= x_. It is often denoted as $\lfloor x \rfloor$ .

Parameters:	x : array_like Input data. out : ndarray, None, or tuple of ndarray and None, optional A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs. where : array_like, optional Values of True indicate to calculate the ufunc at that position, values of False indicate to leave the value in the output alone. **kwargs For other keyword-only arguments, see theufunc docs.
Returns:	y : ndarray or scalar The floor of each element in x.

Parameters:

x : array_like Input data. out : ndarray, None, or tuple of ndarray and None, optional A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs. where : array_like, optional Values of True indicate to calculate the ufunc at that position, values of False indicate to leave the value in the output alone. **kwargs For other keyword-only arguments, see theufunc docs.

Returns:

y : ndarray or scalar The floor of each element in x.

Notes

Some spreadsheet programs calculate the “floor-towards-zero”, in other words floor(-2.5) == -2. NumPy instead uses the definition offloor where floor(-2.5) == -3.

Examples

a = np.array([-1.7, -1.5, -0.2, 0.2, 1.5, 1.7, 2.0]) np.floor(a) array([-2., -2., -1., 0., 1., 1., 2.])