F＃图表示例 [英] F# charting example

问题描述

我想在F＃中使用内置功能或免费库来做一些基本的图表。
我会非常高兴的一个非常基本的例子，如果可能的饼图。

范例资料：

  [（John，34） ;（Sara，30）;（Will，20）;（Maria，16）] 
  

$ b b

其中int是要在饼图中表示的百分比。

我最近安装了VSLab，虽然我发现很多3D示例，我只是寻找一个简单的饼图...

解决方案

p>这里是我使用Google Chart API捣碎的东西，
我希望代码很清楚，没有进一步的解释：

  // Built with F＃1.9.7.8 
 open System.IO 
 open System.Net 
 open Microsoft.FSharp.Control.WebExtensions 
 //为下面的命名空间添加引用如果你不是在F＃交互中运行这个代码
打开System.Drawing 
打开System.Windows.Forms 
 
让buildGoogleChartUri input = 
让chartWidth，chartHeight = 250,100 
 
 let labels，data = List.unzip input 
 let dataString = 
 data 
 |> List.map（box>> string）//以这种方式，数据可以是任何ToString（）将其转换为数字
 |> List.toArray |> String.concat，
 
 let labelString = labels |> List.toArray |> String.concat| 
 
 sprintfhttp://chart.apis.google.com/chart?chs=%dx%d&chd=t:%s&cht=p3&chl=%s
 chartWidth chartHeight dataString labelString 
 
 //从google图表URI中烘焙一个位图
 let buildGoogleChart myData = 
 async {
 let req = HttpWebRequest.Create（buildGoogleChartUri myData ）
 let！ response = req.AsyncGetResponse（）
 return new Bitmap（response.GetResponseStream（））
} |> Async.RunSynchronously 
 
 //调用google chart api从数据中构建一个图表，并以一种形式显示图像
 //引用斜坡的winforms代码
 let test （）= 
 let myData = [（John，34）;（Will，20）;（Maria，16）] 
 $ b b let image = buildGoogleChart myData 
 let frm = new Form（）
 frm.BackgroundImage<  -  image 
 frm.BackgroundImageLayout<  -  ImageLayout.Center 
 frm.ClientSize< -  image.Size 
 frm.Show（）
  

I would like to do some basic charting in F# using build in features or a free library. And I would be very very pleased with a very basic example of it, a pie chart if possible.

Example data :

[("John",34);("Sara",30);("Will",20);("Maria",16)] 

Where the ints are percentages to be represented in the pie.

I have recently installed VSLab and though I find a lot of 3D examples, I am only looking for a simple pie chart...

It is also fine to use excel features by the way, not free, but installed nevertheless..

解决方案

Here's something I smashed together using the Google Chart API, I hope the code is clear enough without further explanation:

//Built with F# 1.9.7.8
open System.IO
open System.Net
open Microsoft.FSharp.Control.WebExtensions
//Add references for the namespaces below if you're not running this code in F# interactive
open System.Drawing 
open System.Windows.Forms 

let buildGoogleChartUri input =
    let chartWidth, chartHeight = 250,100

    let labels,data = List.unzip input
    let dataString = 
        data 
        |> List.map (box>>string) //in this way, data can be anything for which ToString() turns it into a number
        |> List.toArray |> String.concat ","

    let labelString = labels |> List.toArray |> String.concat "|"

    sprintf "http://chart.apis.google.com/chart?chs=%dx%d&chd=t:%s&cht=p3&chl=%s"
            chartWidth chartHeight dataString labelString

//Bake a bitmap from the google chart URI
let buildGoogleChart myData =
    async {
        let req = HttpWebRequest.Create(buildGoogleChartUri myData)
        let! response = req.AsyncGetResponse()
        return new Bitmap(response.GetResponseStream())
    } |> Async.RunSynchronously

//invokes the google chart api to build a chart from the data, and presents the image in a form
//Excuse the sloppy winforms code
let test() =
    let myData = [("John",34);("Sara",30);("Will",20);("Maria",16)]

    let image = buildGoogleChart myData
    let frm = new Form()
    frm.BackgroundImage <- image
    frm.BackgroundImageLayout <- ImageLayout.Center
    frm.ClientSize <- image.Size
    frm.Show()

这篇关于F＃图表示例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！