IfElse with OR運算符

Question

試圖將多個變量合併爲二分變量。我想使用OR運算符「|」來根據原始變量中的條件值分配新值，

數據幀c具有與值 「原因」 一欄（ 「回答」， 「不能談」， 「called_back」， 「懸而未決」， 「語音郵件」）

# Collapse several responses into one value 
c$answered <- if(c$reason == "answered" | 
        "couldNotTalk" | 
        "called_back") 
        {c$answer == "answered"} 
       else {c$unanswer == "not answered"} 

這不是工作，但下面是（即使它是有效的）：

"Answered" -> c$answer[c$reason == "answered"] 
"Answered" -> c$answer[c$reason == "couldNotTalk"] 
"Answered" -> c$answer[c$reason == "called_back"] 

Answer 1

在這種情況下，而不是做一個或一堆的的，你可以使用%in%，爲例子

c$reason %in% c("answered", "couldNotTalk", "called_back") 

然後，爲了使用此值而不是使用if，您可以使用名爲ifelse()的矢量化版本。

c$answered <- ifelse(
    c$reason %in% c("answered", "couldNotTalk", "called_back"), 
    "answered", 
    "not answered" 
) 

或當然你也可以