92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
// dist reads newline-separated numbers and describes their distribution.
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//
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// For example,
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//
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// $ seq 1 20 | grep -v 1 | dist
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// N 9 sum 64 mean 7.11111 gmean 5.78509 std dev 5.34894 variance 28.6111
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//
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// min 2
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// 1%ile 2
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// 5%ile 2
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// 25%ile 3.66667
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// median 6
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// 75%ile 8.33333
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// 95%ile 20
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// 99%ile 20
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// max 20
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//
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// ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣠⠖⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠦⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡖ 0.1
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// ⠀⠀⠀⠀⠀⠀⠀⢀⣠⠴⠊⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠲⢤⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡇
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// ⠠⠤⠤⠤⠤⠴⠒⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠑⠲⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠴⠒⠋⠉⠉⠀⠀⠉⠉⠙⠒⠦⠤⠤⠤⠤⠄⠧ 0.0
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// ⠈⠉⠉⠉⠉⠙⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠋⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠋⠉⠉⠉⠉⠉⠉⠉⠉⠉⠁
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// 0 10 20
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package main
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import (
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"bufio"
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"fmt"
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"io"
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"math"
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"os"
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"strconv"
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"strings"
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"github.com/aclements/go-moremath/stats"
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)
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func main() {
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s := readInput(os.Stdin)
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if len(s.Xs) == 0 {
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fmt.Fprintln(os.Stderr, "no input")
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return
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}
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s.Sort()
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fmt.Printf("N %d sum %.6g mean %.6g", len(s.Xs), s.Sum(), s.Mean())
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gmean := s.GeoMean()
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if !math.IsNaN(gmean) {
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fmt.Printf(" gmean %.6g", gmean)
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}
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fmt.Printf(" std dev %.6g variance %.6g\n", s.StdDev(), s.Variance())
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fmt.Println()
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// Quartiles and tails.
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labels := map[int]string{0: "min", 50: "median", 100: "max"}
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for _, p := range []int{0, 1, 5, 25, 50, 75, 95, 99, 100} {
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label, ok := labels[p]
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if !ok {
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label = fmt.Sprintf("%d%%ile", p)
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}
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fmt.Printf("%8s %.6g\n", label, s.Quantile(float64(p)/100))
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}
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fmt.Println()
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// Kernel density estimate.
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kde := &stats.KDE{Sample: s}
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FprintPDF(os.Stdout, kde)
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}
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func readInput(r io.Reader) (sample stats.Sample) {
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scanner := bufio.NewScanner(r)
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for scanner.Scan() {
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l := scanner.Text()
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l = strings.TrimSpace(l)
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if l == "" {
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continue
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}
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value, err := strconv.ParseFloat(l, 64)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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sample.Xs = append(sample.Xs, value)
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}
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if err := scanner.Err(); err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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return
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}
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