decode_ascii.go

package main

import (
	"fmt"
	"strings"
	"os"
	"bufio"
	"io"
	"strconv"
	"gonum.org/v1/gonum/mat"
)

func main() {
	if len(os.Args) < 2 {
		fmt.Printf("Usage: %s <filename>", os.Args[0])
	}
	file, err := os.Open(os.Args[1])
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	defer file.Close()

	var num_list []float64
	row := 0
	num_elem := 0
	r := bufio.NewReader(file)
	for {
		s, e := r.ReadString('\n')
		if e != nil {
			if e != io.EOF {
				fmt.Println(e)
			}
			break
		}
		row += 1
		slist := strings.Split(s[:len(s)-1], " ")
		for _, element := range slist {
			num, _ := strconv.ParseFloat(element, 64)
			num_list = append(num_list, num)
			num_elem += 1
		}
	}
	a := mat.NewDense(row, num_elem/row, num_list)
	fa := mat.Formatted(a, mat.Prefix("    "), mat.Squeeze())
	fmt.Printf("c = %v", fa)
	fmt.Printf("\n")
}