flopscope.

flopscope.numpy.mod

fnp.mod(*args, **kwargs)[flopscope source][numpy source]

Returns the element-wise remainder of division.

Adapted from NumPy docs np.mod

Areacore
Typecounted
NumPy Refnp.mod
Cost
16×numel(output)\text{numel}(\text{output})
Flopscope Context

Element-wise modulo.

Computes the remainder complementary to the floor_divide function. It is equivalent to the Python modulus operator x1 % x2 and has the same sign as the divisor x2. The MATLAB function equivalent to flops.remainder is mod.

Warning.

This should not be confused with:

  • Python 3.7's math.remainder and C's remainder, which computes the IEEE remainder, which are the complement to round(x1 / x2).

  • The MATLAB rem function and or the C % operator which is the complement to int(x1 / x2).

Parameters

x1:array_like

Dividend array.

x2:array_like

Divisor array. If x1.shape != x2.shape, they must be broadcastable to a common shape (which becomes the shape of the output).

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

This condition is broadcast over the input. At locations where the condition is True, the out array will be set to the ufunc result. Elsewhere, the out array will retain its original value. Note that if an uninitialized out array is created via the default out=None, locations within it where the condition is False will remain uninitialized.

**kwargs

For other keyword-only arguments, see the ufunc docs.

Returns

y:ndarray

The element-wise remainder of the quotient floor_divide(x1, x2). This is a scalar if both x1 and x2 are scalars.

See also

Notes

Returns 0 when x2 is 0 and both x1 and x2 are (arrays of) integers. mod is an alias of remainder.

Examples

>>> import flopscope.numpy as fnp
>>> flops.remainder([4, 7], [2, 3])
array([0, 1])
>>> flops.remainder(flops.arange(7), 5)
array([0, 1, 2, 3, 4, 0, 1])

The % operator can be used as a shorthand for flops.remainder on ndarrays.

>>> x1 = flops.arange(7)
>>> x1 % 5
array([0, 1, 2, 3, 4, 0, 1])