thist - a go package for calculating online histograms with plotting to the terminal and images

Check out the watch subcommands from the csvtk and seqkit tools to see the code in action.

Example

package main

import (
        "fmt"
        "github.com/bsipos/thist"
        "math/rand"
        "time"
)

// randStream return a channel filled with endless normal random values
func randStream() chan float64 {
        c := make(chan float64)
        go func() {
                for {
                        c <- rand.NormFloat64()
                }
        }()
        return c
}

func main() {
        // create new histogram
        h := thist.NewHist(nil, "Example histogram", "auto", -1, true)
        c := randStream()

        i := 0
        for {
                // add data point to hsitogram
                h.Update(<-c)
                if i%50 == 0 {
                        // draw histogram
                        fmt.Println(h.Draw())
                        time.Sleep(time.Second)
                }
                i++
        }
}

TODO

• Add more details on online histogram generation.
• Add separate object for online estimation of moments.
• Maybe add tcell as a back-end?