public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
// verify that we have enough data
if (args.length != 3) {
return ErrorEval.VALUE_INVALID;
}
// declare doubles for values
double principal, rate, years, result;
try {
// extract values as ValueEval
ValueEval v1 = OperandResolver.getSingleValue(args[0], ec.getRowIndex(), ec.getColumnIndex());
ValueEval v2 = OperandResolver.getSingleValue(args[1], ec.getRowIndex(), ec.getColumnIndex());
ValueEval v3 = OperandResolver.getSingleValue(args[2], ec.getRowIndex(), ec.getColumnIndex());
// get data as doubles
principal = OperandResolver.coerceValueToDouble(v1);
rate = OperandResolver.coerceValueToDouble(v2);
years = OperandResolver.coerceValueToDouble(v3);
result = calculateMortgagePayment(principal, rate, years);
System.out.println("Result = " + result);
checkValue(result);
} catch (EvaluationException e) {
return e.getErrorEval();
}
return new NumberEval(result);
}
public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) {
double dn;
try {
ValueEval ve1 = OperandResolver.getSingleValue(arg1, srcRowIndex, srcColumnIndex);
dn = OperandResolver.coerceValueToDouble(ve1);
} catch (EvaluationException e1) {
// all errors in the second arg translate to #VALUE!
return ErrorEval.VALUE_INVALID;
}
// weird Excel behaviour on second arg
if (dn < 1.0) {
// values between 0.0 and 1.0 result in #NUM!
return ErrorEval.NUM_ERROR;
}
// all other values are rounded up to the next integer
int k = (int) Math.ceil(dn);
double result;
try {
double[] ds = ValueCollector.collectValues(arg0);
if (k > ds.length) {
return ErrorEval.NUM_ERROR;
}
result = _isLarge ? StatsLib.kthLargest(ds, k) : StatsLib.kthSmallest(ds, k);
NumericFunction.checkValue(result);
} catch (EvaluationException e) {
return e.getErrorEval();
}
return new NumberEval(result);
}
public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) {
double dn;
try {
ValueEval ve1 = OperandResolver.getSingleValue(arg1, srcRowIndex, srcColumnIndex);
dn = OperandResolver.coerceValueToDouble(ve1);
} catch (EvaluationException e1) {
// all errors in the second arg translate to #VALUE!
return ErrorEval.VALUE_INVALID;
}
if (dn < 0 || dn > 1) { // has to be percentage
return ErrorEval.NUM_ERROR;
}
double result;
try {
double[] ds = ValueCollector.collectValues(arg0);
int N = ds.length;
if (N == 0 || N > 8191) {
return ErrorEval.NUM_ERROR;
}
double n = (N - 1) * dn + 1;
if (n == 1d) {
result = StatsLib.kthSmallest(ds, 1);
} else if (n == N) {
result = StatsLib.kthLargest(ds, 1);
} else {
int k = (int) n;
double d = n - k;
result =
StatsLib.kthSmallest(ds, k)
+ d * (StatsLib.kthSmallest(ds, k + 1) - StatsLib.kthSmallest(ds, k));
}
NumericFunction.checkValue(result);
} catch (EvaluationException e) {
return e.getErrorEval();
}
return new NumberEval(result);
}