我想用一個通用的方法來定義我自己的S4類。 setClass("MultiplyObject", representation(the.factor = "numeric"))
# Create a new instance of a class with the "new" method
multobj <- new("MultiplyObject", the.factor = 3)
#
Example of the problem - class.a has slots 1, 2, 3
and inherits from class c (4, and 5).
The slots in class (1, 2, 3) are passed to function.b as variables.
the output of function b is as class.c.
警告警告時產生的S4泛型函數的評價參數不能使用withCallingHandlers被抓（）。 插圖withCallingHandlers的正常行爲： ### simple function that sends a warning
send_warning <- function() {
warning('send_warning')
}
send_warning()
# Wa
要回答this question，我試圖從包raster看看功能extract的源代碼。 > library(raster)
> extract
standardGeneric for "extract" defined from package "raster"
function (x, y, ...)
standardGeneric("extract")
<environment:
我現在有一流的施工人員在兩個方面的工作： 第一， setMethod("initialize", signature(.Object = "BondCashFlows"),
function(.Object, x, y, ...){
do some things [email protected] = array[,m]
}
第二， Bon
好吧，我花了一段時間來創建複製我的問題的代碼片段。這裏是。注意如果你運行命令new("FirstSet", id = "Input", multiplier = 2) 你會得到正確的答案。但是，如果您嘗試創建一個包含兩者的類，您將獲得以下內容：Error in .local(.Object, ...) : argument "id" is missing, with no default。這實際上