我是R的新人。我有以下数据集（数据框）由字符组成：
"Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "N" "N" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "N" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "N" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y" "Y"
"Y" "Y" "Y" "Y" "Y" "Y" "N" "Y" "Y" "Y" "Y" "Y" "Y" "N" "Y" "Y"
我希望将Y替换为1，将N替换为0.因此，我使用以下表达式：
ifelse(Dataset$A=="N",Dataset$A<-0,Dataset$A<-1)
虽然ifelse函数的结果是正确的但是在打印变量时我得到了这个：
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
"1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1" "1"
你有什么提示吗？
答案 0 :(得分：2)
将另一个变量B添加到数据集并使用ifelse函数，其中0为＆＃34; N＆＃34; 1为＆＃34; Y＆＃34;价值
Dataset$B <- ifelse(Dataset$A=="N",0,1)
或者您可以在与
相同的变量上使用ifelse函数Dataset$A <- ifelse(Dataset$A=="N",0,1)
答案 1 :(得分：1)
你也可以这样做：
Dataset$A <- (Dataset$A=="Y")*1
答案 2 :(得分：1)
ifelse可以工作，但另一个选择是使用switch（）函数：
vec <- c("Y","Y","Y","N","N","Y")
sapply(vec, switch, "Y"=1,"N"=0)
它可以满足您的需求，但适用于大小为1的矢量。然后，您可以通过所有元素进行调整。
关于切换功能（ifelse不做）的好处是你可以根据需要使用尽可能多的替换（＆＃34; A＆＃34; = 1，＆＃34; B＆＃34; = 2，＆＃34; C＆＃34; = 3，等等......），