numpy.ipmt — NumPy v1.11 Manual (original) (raw)

rate : scalar or array_like of shape(M, )

Rate of interest as decimal (not per cent) per period

per : scalar or array_like of shape(M, )

Interest paid against the loan changes during the life or the loan. The per is the payment period to calculate the interest amount.

nper : scalar or array_like of shape(M, )

Number of compounding periods

pv : scalar or array_like of shape(M, )

Present value

fv : scalar or array_like of shape(M, ), optional

Future value

when : {{‘begin’, 1}, {‘end’, 0}}, {string, int}, optional

When payments are due (‘begin’ (1) or ‘end’ (0)). Defaults to {‘end’, 0}.