我们从Python开源项目中，提取了以下24个代码示例，用于说明如何使用numpy.ppmt()。
def test_broadcast(self): assert_almost_equal(np.nper(0.075, -2000, 0, 100000., [0, 1]), [21.5449442, 20.76156441], 4) assert_almost_equal(np.ipmt(0.1/12, list(range(5)), 24, 2000), [-17.29165168, -16.66666667, -16.03647345, -15.40102862, -14.76028842], 4) assert_almost_equal(np.ppmt(0.1/12, list(range(5)), 24, 2000), [-74.998201, -75.62318601, -76.25337923, -76.88882405, -77.52956425], 4) assert_almost_equal(np.ppmt(0.1/12, list(range(5)), 24, 2000, 0, [0, 0, 1, 'end', 'begin']), [-74.998201, -75.62318601, -75.62318601, -76.88882405, -76.88882405], 4)
def _convert_when(when): #Test to see if when has already been converted to ndarray #This will happen if one function calls another, for example ppmt if isinstance(when, np.ndarray): return when try: return _when_to_num[when] except (KeyError, TypeError): return [_when_to_num[x] for x in when]
def test_ppmt(self): np.round(np.ppmt(0.1/12, 1, 60, 55000), 2) == 710.25
def ppmt(rate, per, nper, pv, fv=0.0, when='end'): """ Compute the payment against loan principal. Parameters ---------- rate : array_like Rate of interest (per period) per : array_like, int Amount paid against the loan changes. The `per` is the period of interest. nper : array_like Number of compounding periods pv : array_like Present value fv : array_like, optional Future value when : {{'begin', 1}, {'end', 0}}, {string, int} When payments are due ('begin' (1) or 'end' (0)) See Also -------- pmt, pv, ipmt """ total = pmt(rate, nper, pv, fv, when) return total - ipmt(rate, per, nper, pv, fv, when)
