Zgo - stats.go

package main

import (
    "fmt"
    "math"
    "os"
    "slices"
    "strconv"
)

func main() {
    args := os.Args
    if len(args) == 1 {
        fmt.Println("Need one or more arguments!")
        return
    }

    var validArgs = make([]float64, 0, len(args) - 1)
    var sumValue float64
    for i := 1; i < len(args); i++ {
        n, err := strconv.ParseFloat(args[i], 64)
        if err != nil {
            continue
        }

        validArgs = append(validArgs, n)
        sumValue += n
    }

    // Number of values, Min value, Max value
    count := len(validArgs)
    minValue := slices.Min(validArgs)
    maxValue := slices.Max(validArgs)
    fmt.Println("Number of values: ", count)
    fmt.Println("Min: ", minValue)
    fmt.Println("Max: ", maxValue)

    // Mean value
    if count == 0 {
        return
    }
    meanValue := sumValue / float64(count)
    fmt.Printf("Mean value: %.5f\n", meanValue)

    // Standard deviation
    var squared float64
    for _, n := range validArgs {
        squared += math.Pow(n - meanValue, 2)
    }
    sd := math.Sqrt(squared / float64(count))
    fmt.Printf("Standard deviation: %.5f\n", sd)
}