如何获得相应的价值在两个数据帧

Question

我有一个文件：

FILE_A：

ID C1.x C2.x C3.x C4.x C5.x 
M1 60 32 19 25 5 
M2 5 14 12 15 5 
M3 51 2 2 8 8 
M4 15 8 8 8 7 
M5 12 86 7 8 9 

FILE_B：

ID C1.y C2.y C3.y C4.y C5.y 
M1 N K K K N 
M2 M M M M M 
M3 Y T T T T 
M4 A A A A A 
M5 C C N C C 

过滤器是5.如果小于5，那么相应的列应该变为N.

感谢

Answer 1

如果一切线正确，你可以简单地使用：

#Test data 
dat <- data.frame("ID"=c("M1","M2", "M3", "M4", "M5"), "C1.x"=c(60,5,51,15,12), "C2.x"=c(32,14,2,8,86), "C3.x"=c(19,12,2,8,7), stringsAsFactors=FALSE) 
dat2 <- data.frame("ID"=c("M1","M2", "M3", "M4", "M5"), "C1.x"=c("N", "M", "Y", "A", "C"), "C2.x"=c("N", "M", "Y", "A", "C"), "C3.x"=c("N", "M", "Y", "A", "C"), stringsAsFactors=FALSE) 

dat2[dat < 5] <- "N" 

我认为这是你正在寻找的输出。如果没有，请澄清。