Numpy 1.10
Numpy 1.10
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numpy.ipmt()

numpy.ipmt

numpy.ipmt(rate, per, nper, pv, fv=0.0, when='end') [source]

Compute the interest portion of a payment.

Parameters:

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