Financial functions

Simple financial functions

fv (rate, nper, pmt, pv[, when]) Compute the future value.
pv (rate, nper, pmt[, fv, when]) Compute the present value.
npv (rate, values) Returns the NPV (Net Present Value) of a cash flow series.
pmt (rate, nper, pv[, fv, when]) Compute the payment against loan principal plus interest.
ppmt (rate, per, nper, pv[, fv, when]) Not implemented. Compute the payment against loan principal.
ipmt (rate, per, nper, pv[, fv, when]) Not implemented. Compute the payment portion for loan interest.
irr (values) Return the Internal Rate of Return (IRR).
mirr (values, finance_rate, ...) Modified internal rate of return.
nper (rate, pmt, pv[, fv, when]) Compute the number of periods.
rate (nper, pmt, pv, fv[, when, guess, tol, ...]) Compute the rate of interest per period.