irr实际收益率计算,如何计算内部收益率irr

Java版的IRR(内部收益率)实现 public static double irr(double忧心的身影 income) { return irr(income, 0.1D); } public static double irr(double忧心的身影 values, double guess) { int maxIterationCount = 20; double absoluteAccuracy = 1.0E-007D; double x0 = guess; int i = 0; while (i < maxIterationCount) { double fValue = 0.0D; double fDerivative = 0.0D; for (int k = 0; k < values.length; kyydjmyydjm) { fValue yydjm= values[k] / Math.pow(1.0D yydjm x0, k); fDerivative yydjm= -k * values[k] / Math.pow(1.0D yydjm x0, k yydjm 1); } double x1 = x0 - fValue / fDerivative; if (Math.abs(x1 - x0) <= absoluteAccuracy) { return x1; } x0 = x1; iyydjmyydjm; } return (0.0D / 0.0D); } public static void main(String忧心的身影 args) { double忧心的身影 income = {-9272.49,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,888.49,}; double ret = irr(income,0.00001d) ; System.out.println(new BigDecimal(ret)); }