我有这张桌子:
现在我想为年龄较小的年轻人创建一个交叉表,所以它看起来像这样:
/ alive / dead
1/372/46
0/393/25
我想使用子集从原始表中获取正确的数据,但我真的不知道从哪里开始,有人可以帮助我吗?
答案 0 :(得分:1)
尝试:
SmokersAlive <- subset(df, Smoker == 1) #table showing only the smokers
SmokersAlive <- sum(subset(df, Smoker == 1)$Alive) #sum of col. "Alive" from table above
这里是您需要的代码:
SmokersAlive <- sum(subset(df, Smoker == 1)$Dead)
SmokersDead <- 1 #sum(subset....) should stand here
NonSmokersAlive <- 1 #...
NonSmokersDead <- 1
Overview <- data.frame(matrix(c(SmokersAlive, SmokersDead, NonSmokersAlive, NonSmokersDead), ncol = 2, byrow = TRUE))
colnames(Overview) <- c("alive","dead")
rownames(Overview) <- c("0","1")
Overview