如何创建CSV文件并将数据写入F#中 [英] How to create a CSV file and write data into in f#

问题描述

我怎样才能在f sharp中创建一个csv文件并在其中写入以下记录类型?

How can i can i create a csv file in f sharp and write the following record type in it?

    type test = { G:array<double>; P:array<double>; GG:array<double>; PP:array<double> } 

    let table = [for x in 0..(Un0.Length - 1) -> 
        let b = Un0.[x] in 
        if b=0.0 then {G=0.0; P=0.0; GG=0.0; PP=0.0}
        else {G=G_0.[x]/b; P=P0.[x]/b; GG=G0.[x]/b; PP=PP0.[x]/b}]

推荐答案

使用F#数据不必在.csv中进行记录.

To record in .csv is not necessary to use F# Data.

我更改了test的定义并添加了一些值，以便您可以进行编译:

I changed the definition of test and added some values so that you can compile:

type test = { G:double; P:double; GG:double; PP:double }
            override this.ToString() = 
                sprintf "%f;%f;%f;%f\n" this.G this.P this.GG this.PP

let G_0  =  [|(0.0)..(10.0)|]
let Un0  =  [|(1.0)..(11.0)|]
let P0   =  [|(2.0)..(12.0)|]
let G0   =  [|(3.0)..(13.0)|]
let PP0  =  [|(4.0)..(14.0)|]

let table = [for x in 0..(Un0.Length - 1) -> 
                let b = Un0.[x] 
                if b=0.0 then {G=0.0; P=0.0; GG=0.0; PP=0.0}
                else {G=G_0.[x]/b; P=P0.[x]/b; GG=G0.[x]/b; PP=PP0.[x]/b}]

let wr = new System.IO.StreamWriter("Csv.csv")
table |> List.map(string) |> String.concat("") |> wr.Write
wr.Close()

结果:

这篇关于如何创建CSV文件并将数据写入F#中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！