Evaluates the future value of an initial principal taking into consideration a schedule of compound interest rates.

principal—Principal or present value.

schedule—One-dimensional array of interest rates to apply.

result—The future value of an initial principal after applying a schedule of compound interest rates. If no result can be computed, NaN is returned.

Double—If present and nonzero, double precision is used.

Function FUTURE_VAL_SCHD computes the future value of an initial principal after applying a schedule of compound interest rates.

It is computed using the following with count = N_ELEMENTS (schedule):

where schedulei = interest rate at the ith period.

In this example, FUTURE_VAL_SCHD computes the value of a $10,000 investment after 5 years with interest rates of 5%, 5.1%, 5.2%, 5.3% and 5.4%, respectively.

principal = 10000.0

schedule = [ .050, .051, .052, .053, .054 ]

PRINT, FUTURE_VAL_SCHD(principal, schedule)

; PV-WAVE prints: 12884.8