Issue

This Content is from Stack Overflow. Question asked by pefr

I am searching to convert an array of byte ([]byte) to array of float64 ([]float64) but I didn’t have any clues to do it.

I read data from rtlsdr package (https://pkg.go.dev/github.com/jpoirier/gortlsdr) and would pass it to Pwelch algorithm (https://pkg.go.dev/github.com/mjibson/go-dsp/spectral)

Is it possible to convert large array of byte to float64 ?

(+ another question: did you think that possible to convert Pwelch function to work with uint8 ?)

Thank you so much,
pefr

Solution

byte/uint8 has 8 bits, float64 has 64. You can convert [8]byte to float64 like this:

package main

import (
    "encoding/binary"
    "fmt"
    "math"
)

main()
{
    in := 1.

    // Convert float64 to [8]byte
    var bytes [8]byte
    binary.LittleEndian.PutUint64(bytes[:], math.Float64bits(in))

    // Convert [8]byte to float64
    out := math.Float64frombits(binary.LittleEndian.Uint64(bytes[:]))

    fmt.Println(out)
}

You may want to chose binary.BigEndian instead.

Is that what you are looking for? Or do you want to convert an array of byte with length 8n to an array of float64 with length n? Feel free to comment 🙂

This Question was asked in StackOverflow by pefr and Answered by some-user It is licensed under the terms of CC BY-SA 2.5. - CC BY-SA 3.0. - CC BY-SA 4.0.