如何在 FSI 中将 Deedle DataFrame 显示为漂亮的 table？

Question

阅读文章 Analyzing and Visualizing Data with F# (https://www.oreilly.com/ideas/analyzing-and-visualizing-data-with-f-sharp/page/2/analyzing-data-using-f-and-deedle) 我收集到（可能是错误的）可以在 FSharp Interactive 中显示 Deedle DataFrame 的内容（FSI) 作为一个不错的 table。

让我这么想的文字片段如下：

When you create a data frame, F# Interactive formats it nicely so you can get a quick idea about the data. For example, in Table 2-1 you can see the ranges of the values and which values are frequently missing.

这些行之前有一个漂亮的 table 显示 DataFrame 的内容。

无需安装和打开FSLab，按照文章中的建议，当我可以在FSI中创建一个DataFrame，然后输入它的名字和“;;”我得到这样的东西：

> df;;
val it : Frame<int,string> =
  Deedle.Frame`2[System.Int32,System.String]
    {ColumnCount = 2;
     ColumnIndex = Deedle.Indices.Linear.LinearIndex`1[System.String];
     ColumnKeys = seq ["A"; "B"];
     ColumnTypes = seq [System.Int32; System.Int32];
     Columns = series [ A => series [ 0 => 1; 1 => 2; 2 => 3; 3 => 4; 4 => 5;  ... ; 9 => 10]; B => series [ 0 => 11; 1 => 12; 2 => 13; 3 => 14; 4 => 15;  ... ; 9 => 20]];
     ColumnsDense = series [ A => series [ 0 => 1; 1 => 2; 2 => 3; 3 => 4; 4 => 5;  ... ; 9 => 10]; B => series [ 0 => 11; 1 => 12; 2 => 13; 3 => 14; 4 => 15;  ... ; 9 => 20]];
     IsEmpty = false;
     Item = ?;
     Item = ?;
     RowCount = 10;
     RowIndex = Deedle.Indices.Linear.LinearIndex`1[System.Int32];
     RowKeys = seq [0; 1; 2; 3; ...];
     Rows = series [ 0 => series [ A => 1; B => 11]; 1 => series [ A => 2; B => 12]; 2 => series [ A => 3; B => 13]; 3 => series [ A => 4; B => 14]; 4 => series [ A => 5; B => 15];  ... ; 9 => series [ A => 10; B => 20]];
     RowsDense = series [ 0 => series [ A => 1; B => 11]; 1 => series [ A => 2; B => 12]; 2 => series [ A => 3; B => 13]; 3 => series [ A => 4; B => 14]; 4 => series [ A => 5; B => 15];  ... ; 9 => series [ A => 10; B => 20]];}

所以我尝试安装 FSLab，但它似乎与我之前安装的软件包版本不兼容。安装没有完成，我收到以下消息：

Severity    Code    Description Project File    Line    Suppression State
Error       Unable to resolve dependencies. 'FSharp.Data 2.4.6' is not compatible with 'FsLab 1.0.2 constraint: FSharp.Data (= 2.3.2)'.         0

我怀疑这个问题有一个简单的解决方案。

所以，

1) 我真的可以得到一个很好的 table 来显示 FSI 中 Deedle DataFrame 的内容吗（就像一个人所做的那样，例如 RStudio 对于 R)?

2) 如果是，我应该怎么做才能在不向后移动我安装的软件包版本的情况下可视化这样的 table？

Answer 1

如果您使用包中包含的 Deedle.fsx 加载脚本引用 Deedle，F# Interactive 的打印机会自动注册：

#load "packages/Deedle/Deedle.fsx"
open Deedle

let df = 
  [ "First" => Series.ofValues [1;2;3;4]
    "Second" => Series.ofValues [1;2;3;4] ]
  |> frame

如果您使用 Paket 和运行上面的代码引用 Deedle，您会变得很好 print-out。或者，您也可以通过显式调用获得相同的输出：

df.Print()

如何在 FSI 中将 Deedle DataFrame 显示为漂亮的 table？

How do I display a Deedle DataFrame as a nice table in FSI?

f#

dataframe

fsi

deedle