快速入门：使用Go语言函数实现简单的数据分析功能

package main

import (
    "bufio"
    "fmt"
    "os"
    "strconv"
    "strings"
)

func importData(filename string) ([]float64, error) {
    file, err := os.Open(filename)
    if err != nil {
        return nil, err
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)
    var data []float64
    for scanner.Scan() {
        line := scanner.Text()
        num, err := strconv.ParseFloat(line, 64)
        if err != nil {
            return nil, err
        }
        data = append(data, num)
    }

    return data, nil
}

func main() {
    data, err := importData("data.txt")
    if err != nil {
        fmt.Println("Failed to import data:", err)
        return
    }

    fmt.Println("Imported data:", data)
}

package main

import (
    "fmt"
    "math"
)

func mean(data []float64) float64 {
    sum := 0.0
    for _, num := range data {
        sum += num
    }
    return sum / float64(len(data))
}

func sum(data []float64) float64 {
    sum := 0.0
    for _, num := range data {
        sum += num
    }
    return sum
}

func max(data []float64) float64 {
    max := math.Inf(-1)
    for _, num := range data {
        if num > max {
            max = num
        }
    }
    return max
}

func main() {
    data := []float64{1.0, 2.0, 3.0, 4.0, 5.0, 6.0}
    fmt.Println("Mean:", mean(data))
    fmt.Println("Sum:", sum(data))
    fmt.Println("Max:", max(data))
}

package main

import (
    "fmt"
    "github.com/wcharczuk/go-chart"
    "os"
)

func plot(data []float64) {
    xvalues := make([]float64, len(data))
    yvalues := make([]float64, len(data))
    for i, num := range data {
        xvalues[i] = float64(i)
        yvalues[i] = num
    }

    graph := chart.Chart{
        Series: []chart.Series{
            chart.ContinuousSeries{
                XValues: xvalues,
                YValues: yvalues,
            },
        },
    }

    f, _ := os.Create("plot.png")
    defer f.Close()
    graph.Render(chart.PNG, f)
}

func main() {
    data := []float64{1.0, 2.0, 3.0, 4.0, 5.0, 6.0}
    plot(data)
    fmt.Println("Plot created: plot.png")
}