numpy.left_shift(x1, x2[, out]) =
Shift the bits of an integer to the left.
Bits are shifted to the left by appending x2
0s at the right of x1
. Since the internal representation of numbers is in binary format, this operation is equivalent to multiplying x1
by 2**x2
.
Parameters: |
x1 : array_like of integer type Input values. x2 : array_like of integer type Number of zeros to append to |
---|---|
Returns: |
out : array of integer type Return |
See also
right_shift
binary_repr
>>> np.binary_repr(5) '101' >>> np.left_shift(5, 2) 20 >>> np.binary_repr(20) '10100'
>>> np.left_shift(5, [1,2,3]) array([10, 20, 40])
© 2008–2016 NumPy Developers
Licensed under the NumPy License.
https://docs.scipy.org/doc/numpy-1.10.1/reference/generated/numpy.left_shift.html