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#65 fn: PERCENTILE and PERMUTATIONA

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xuri 2021-03-27 00:08:55 +08:00
parent 3903c106a4
commit 6d7bd7cd8a
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2 changed files with 84 additions and 0 deletions
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67
calc.go
View File

@ -339,7 +339,9 @@ var tokenPriority = map[string]int{
// OCT2HEX
// ODD
// OR
// PERCENTILE
// PERMUT
// PERMUTATIONA
// PI
// POISSON.DIST
// POISSON
@ -4519,6 +4521,46 @@ func (fn *formulaFuncs) min(mina bool, argsList *list.List) formulaArg {
return newNumberFormulaArg(min)
}
// PERCENTILE function returns the k'th percentile (i.e. the value below which
// k% of the data values fall) for a supplied range of values and a supplied
// k. The syntax of the function is:
//
// PERCENTILE(array,k)
//
func (fn *formulaFuncs) PERCENTILE(argsList *list.List) formulaArg {
if argsList.Len() != 2 {
return newErrorFormulaArg(formulaErrorVALUE, "PERCENTILE requires 2 arguments")
}
array := argsList.Front().Value.(formulaArg).ToList()
k := argsList.Back().Value.(formulaArg).ToNumber()
if k.Type != ArgNumber {
return k
}
if k.Number < 0 || k.Number > 1 {
return newErrorFormulaArg(formulaErrorNA, formulaErrorNA)
}
numbers := []float64{}
for _, arg := range array {
if arg.Type == ArgError {
return arg
}
num := arg.ToNumber()
if num.Type == ArgNumber {
numbers = append(numbers, num.Number)
}
}
cnt := len(numbers)
sort.Float64s(numbers)
idx := k.Number * (float64(cnt) - 1)
base := math.Floor(idx)
if idx == base {
return newNumberFormulaArg(numbers[int(idx)])
}
next := base + 1
proportion := idx - base
return newNumberFormulaArg(numbers[int(base)] + ((numbers[int(next)] - numbers[int(base)]) * proportion))
}
// PERMUT function calculates the number of permutations of a specified number
// of objects from a set of objects. The syntax of the function is:
//
@ -4542,6 +4584,31 @@ func (fn *formulaFuncs) PERMUT(argsList *list.List) formulaArg {
return newNumberFormulaArg(math.Round(fact(number.Number) / fact(number.Number-chosen.Number)))
}
// PERMUTATIONA function calculates the number of permutations, with
// repetitions, of a specified number of objects from a set. The syntax of
// the function is:
//
// PERMUTATIONA(number,number_chosen)
//
func (fn *formulaFuncs) PERMUTATIONA(argsList *list.List) formulaArg {
if argsList.Len() < 1 {
return newErrorFormulaArg(formulaErrorVALUE, "PERMUTATIONA requires 2 numeric arguments")
}
number := argsList.Front().Value.(formulaArg).ToNumber()
chosen := argsList.Back().Value.(formulaArg).ToNumber()
if number.Type != ArgNumber {
return number
}
if chosen.Type != ArgNumber {
return chosen
}
num, numChosen := math.Floor(number.Number), math.Floor(chosen.Number)
if num < 0 || numChosen < 0 {
return newErrorFormulaArg(formulaErrorNA, formulaErrorNA)
}
return newNumberFormulaArg(math.Pow(num, numChosen))
}
// SKEW function calculates the skewness of the distribution of a supplied set
// of values. The syntax of the function is:
//

17
calc_test.go
View File

@ -680,10 +680,16 @@ func TestCalcCellValue(t *testing.T) {
"=MINA(MUNIT(2))": "0",
"=MINA(INT(1))": "1",
"=MINA(A1:B4,MUNIT(1),INT(0),1,E1:F2,\"\")": "0",
// PERCENTILE
"=PERCENTILE(A1:A4,0.2)": "0.6",
"=PERCENTILE(0,0)": "0",
// PERMUT
"=PERMUT(6,6)": "720",
"=PERMUT(7,6)": "5040",
"=PERMUT(10,6)": "151200",
// PERMUTATIONA
"=PERMUTATIONA(6,6)": "46656",
"=PERMUTATIONA(7,6)": "117649",
// SKEW
"=SKEW(1,2,3,4,3)": "-0.404796008910937",
"=SKEW(A1:B2)": "0",
@ -1473,11 +1479,22 @@ func TestCalcCellValue(t *testing.T) {
// MINA
"=MINA()": "MINA requires at least 1 argument",
"=MINA(NA())": "#N/A",
// PERCENTILE
"=PERCENTILE()": "PERCENTILE requires 2 arguments",
"=PERCENTILE(0,\"\")": "strconv.ParseFloat: parsing \"\": invalid syntax",
"=PERCENTILE(0,-1)": "#N/A",
"=PERCENTILE(NA(),1)": "#N/A",
// PERMUT
"=PERMUT()": "PERMUT requires 2 numeric arguments",
"=PERMUT(\"\",0)": "strconv.ParseFloat: parsing \"\": invalid syntax",
"=PERMUT(0,\"\")": "strconv.ParseFloat: parsing \"\": invalid syntax",
"=PERMUT(6,8)": "#N/A",
// PERMUTATIONA
"=PERMUTATIONA()": "PERMUTATIONA requires 2 numeric arguments",
"=PERMUTATIONA(\"\",0)": "strconv.ParseFloat: parsing \"\": invalid syntax",
"=PERMUTATIONA(0,\"\")": "strconv.ParseFloat: parsing \"\": invalid syntax",
"=PERMUTATIONA(-1,0)": "#N/A",
"=PERMUTATIONA(0,-1)": "#N/A",
// SKEW
"=SKEW()": "SKEW requires at least 1 argument",
"=SKEW(\"\")": "strconv.ParseFloat: parsing \"\": invalid syntax",