統計解析R たぶんpart3くらい

統計解析R たぶんpart3くらい (587ﾚｽ)
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480: デフォルトの名無しさん [] 2023/03/04(土) 20:31:08.80 ID:0X36s/jF

## Rにおけるオブジェクト指向への取り組み
趣旨は新規フレームワークR7の紹介だが、既存のフレームワークの俯瞰図
としても使いやすいと思う。

* [What is R7? A New OOP System for R](https://www.jumpingrivers.com/blog/r7-oop-object-oriented-programming-r/)

## オブジェクト指向とは？
次の記事を取り上げてみる。

* [Object Oriented Programming Features of Rust](https://doc.rust-lang.org/book/ch17-00-oop.html)

内容については賛否両論だと思う。しかし、箇条書きできるということが、
オブジェクト指向が単一の概念でないことを示しているように思う。

## S3はオブジェクト指向か？
比較のために、S3のキーワード`default`を使わないで書く。

``` {r a_3770, dependson = ""}
none = with (new.env (), {
to_string = \(x, ...) UseMethod ("to_string", x)
as_string = \(x, ...) UseMethod ("as_string", x)

to_string.Base = \(x, ...) as_string (x, ...)
as_string.Base = \(x, ...) to_string (x, ...)

to_string.Derived = \(x, ...) paste0 ("hello ", class (x))
as_string.Derived = as_string.Base

structure (identity, class = "Derived") |> as_string () |> print ()
});
```
`Base`クラスは、関数`to_string`か関数`as_string`の"どちらか1つを実装せえ"と言っている。

http://mevius.5ch.net/test/read.cgi/tech/1340339592/480

565: デフォルトの名無しさん [] 2023/12/20(水) 23:21:30.67 ID:H48HUSxu

ChatGPTはなんていい奴なんだろう。

クソ野郎: I'd like to test the following code:

``` r
拝借
```

* The code is written in the programming language R.
* "子", "丑", ..., are the Chinese / Japanese zodiac called Eto in Japanese.

This code have to calculate the age for given birth date in Eto, e.g.
`eto = "ひつじ", tag = date = "10-17"`. Are there any advice to test this code?

ChatGPT: Certainly! To test the provided R code, you can follow these steps:

1. Understand the Code:
* Make sure you understand the logic of the code and how it calculates age based on the Eto and birthdate information.
1. Run the Code:
* Copy and paste the code into an R script or R console.
* Ensure that there are no syntax errors or issues when running the code.
1. Test Cases:
* Define several test cases with different combinations of Eto, birthdate (tag), and current date.
* For example, you can use different values for eto and tag, and verify the calculated age against your expectations.
1. Expected Results:
* Manually calculate the expected age for each test case based on the provided Eto information and current date.
* Compare the manually calculated age with the age calculated by the R code.
1. Edge Cases:
* Test the code with edge cases, such as birthdates close to the boundary of age ranges, to ensure the code handles them correctly.

http://mevius.5ch.net/test/read.cgi/tech/1340339592/565

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