Roxygen2 - 如何正确记录 S3 方法

发布于 2024-12-02 00:10:52 字数 745 浏览 1 评论 0原文

我已经阅读了 Roxygen2 PDF 和这个网站，但我迷路了关于 @method @S3method @export 之间的区别以及如何使用它们来正确记录 S3 方法。我编写了以下示例进行讨论：

我如何正确记录这些？
如何模拟 ?print 和其他通用函数的文档，以显示所有特定于类的用例implimentations（即 ?print 显示“factor”、“table”、“function”用法的方式）
来自 wiki 页面：“所有导出的方法都需要 @S3method 标记。它与 @ 的格式相同该方法导出。方法，而不是函数 - 即 generic(myobject) 可以工作，但 generic.mymethod(myobject) 不会。”
我无法解释这一点。这似乎是说，如果标签指定不正确，函数/方法调用将无法正常工作？具体会破坏什么？

    MyHappyFunction = function( x , ... )
    {
        UseMethod( "MyHappyFunction" )
    }
    
    MyHappyFunction.lm = function( x , ... )
    {
      # do some magic
    }

原文

I've read the Roxygen2 PDF and this site, and I'm lost on the difference between @method @S3method @export and how to use these to properly document S3 methods. I worked up the follow example for discussion:

How would I properly document these?
How do I emulate documentation of ?print and other generic functions that show the use cases for all class-specific implimentations (i.e. the way ?print shows usage for 'factor', 'table','function')
From the wiki page: "All exported methods need the @S3method tag. It has the same format as @method. This exports the method, not the function - i.e. generic(myobject) will work, but generic.mymethod(myobject) will not."
I can't interpret this. This seems to say that function/method calls won't work properly if the tags are improperly specified? What specifically will break?

    MyHappyFunction = function( x , ... )
    {
        UseMethod( "MyHappyFunction" )
    }
    
    MyHappyFunction.lm = function( x , ... )
    {
      # do some magic
    }

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小苏打饼 2024-12-09 00:10:52

从 roxygen2 >3.0.0 开始，您只需要 @export：

#' A description of MyHappyFunction
#'
#' A details of MyHappyFunction
#'
#' @title MyHappyFunction: The my happy function
#' @param x numeric number
#' @param ... other arguments
#' @examples
#' a <- 1
#' class(a) <- "lm"
#' MyHappyFunction(a)
#' @export
MyHappyFunction <- function(x, ...){
  UseMethod("MyHappyFunction")
}

#' @rdname MyHappyFunction
#' @export
MyHappyFunction.lm = function(x, ...) {
  # do some magic
}

#' @rdname MyHappyFunction
#' @export
MyHappyFunction.default = function(x, ...) {
  # do some magic
}

但由于您实际上并未记录这些方法，因此以下是
充足的：

#' A description of MyHappyFunction
#'
#' A details of MyHappyFunction
#'
#' @title MyHappyFunction: The my happy function
#' @param x numeric number
#' @param ... other arguments
#' @examples
#' a <- 1
#' class(a) <- "lm"
#' MyHappyFunction(a)
#' @export
MyHappyFunction <- function(x, ...){
  UseMethod("MyHappyFunction")
}

#' @export
MyHappyFunction.lm = function(x, ...) {
  # do some magic
}

#' @export
MyHappyFunction.default = function(x, ...) {
  # do some magic
}

As of roxygen2 >3.0.0, you only need @export:

#' A description of MyHappyFunction
#'
#' A details of MyHappyFunction
#'
#' @title MyHappyFunction: The my happy function
#' @param x numeric number
#' @param ... other arguments
#' @examples
#' a <- 1
#' class(a) <- "lm"
#' MyHappyFunction(a)
#' @export
MyHappyFunction <- function(x, ...){
  UseMethod("MyHappyFunction")
}

#' @rdname MyHappyFunction
#' @export
MyHappyFunction.lm = function(x, ...) {
  # do some magic
}

#' @rdname MyHappyFunction
#' @export
MyHappyFunction.default = function(x, ...) {
  # do some magic
}

But since you're not actually documenting the methods, the following is
sufficient:

#' A description of MyHappyFunction
#'
#' A details of MyHappyFunction
#'
#' @title MyHappyFunction: The my happy function
#' @param x numeric number
#' @param ... other arguments
#' @examples
#' a <- 1
#' class(a) <- "lm"
#' MyHappyFunction(a)
#' @export
MyHappyFunction <- function(x, ...){
  UseMethod("MyHappyFunction")
}

#' @export
MyHappyFunction.lm = function(x, ...) {
  # do some magic
}

#' @export
MyHappyFunction.default = function(x, ...) {
  # do some magic
}

回复收藏 0 原文

╰◇生如夏花灿烂 2024-12-09 00:10:52

@method 标记在 Rd 文件的 \usage 字段中生成 \method 条目。

@S3method 标记在 NAMESPACE 文件中生成 S3method() 条目。

@export 标记在 NAMESPACE 文件中生成 export() 条目。

这是我的示例：

#' A description of MyHappyFunction
#'
#' A details of MyHappyFunction
#'
#' @title MyHappyFunction: The my happy function
#' @param x numeric number
#' @param ... other arguments
#' @examples
#' a <- 1
#' class(a) <- "lm"
#' MyHappyFunction(a)
#'
#' @rdname MyHappyFunction
#' @export MyHappyFunction
MyHappyFunction <- function(x, ...){
  UseMethod("MyHappyFunction")
}

#' @return \code{NULL}
#'
#' @rdname MyHappyFunction
#' @method MyHappyFunction lm
#' @S3method MyHappyFunction lm
MyHappyFunction.lm = function(x, ...) {
  # do some magic
}

#' @return \code{NULL}
#'
#' @rdname MyHappyFunction
#' @method MyHappyFunction default
#' @S3method MyHappyFunction default
MyHappyFunction.default = function(x, ...) {
  # do some magic
}

在此处输入图像描述

3 来自维基页面...

我猜这意味着“你不写@S3method generic mymethod myobject”。

The @method tag generates \method entries in the \usage field in Rd files.

The @S3method tag generates S3method() entries in the NAMESPACE file.

The @export tag generates export() entries in the NAMESPACE file.

Here is my example:

#' A description of MyHappyFunction
#'
#' A details of MyHappyFunction
#'
#' @title MyHappyFunction: The my happy function
#' @param x numeric number
#' @param ... other arguments
#' @examples
#' a <- 1
#' class(a) <- "lm"
#' MyHappyFunction(a)
#'
#' @rdname MyHappyFunction
#' @export MyHappyFunction
MyHappyFunction <- function(x, ...){
  UseMethod("MyHappyFunction")
}

#' @return \code{NULL}
#'
#' @rdname MyHappyFunction
#' @method MyHappyFunction lm
#' @S3method MyHappyFunction lm
MyHappyFunction.lm = function(x, ...) {
  # do some magic
}

#' @return \code{NULL}
#'
#' @rdname MyHappyFunction
#' @method MyHappyFunction default
#' @S3method MyHappyFunction default
MyHappyFunction.default = function(x, ...) {
  # do some magic
}

enter image description here