Function _decade_less_equal

lib/matplotlib/ticker.py:2345–2353

Return the largest integer power of *base* that's less or equal to *x*. If *x* is negative, the exponent will be *greater*.

(x, base)

def _decade_less_equal(x, base):
    """
    Return the largest integer power of *base* that's less or equal to *x*.

    If *x* is negative, the exponent will be *greater*.
    """
    return (x if x == 0 else
            -_decade_greater_equal(-x, base) if x < 0 else
            base ** np.floor(np.log(x) / np.log(base)))


def _decade_greater_equal(x, base):