在R中创建一条错误消息,用于标识不匹配的值

时间:2013-10-02 08:53:02

标签: r if-statement

我正在编写一个相当长的函数,要求所有的名字(abun)都存在于rownames(x)中,但反之亦然。如果不满足要求,我设计了它,以便函数抛出错误消息。除了错误消息,我还想告诉用户哪些colnames(abun)不在rownames(x)中。有任何想法吗?我当前的停止和错误消息如下所示:

abun <- matrix(c(0.4,0,0.6,0.1,0.4,0.5), 
    nrow = 2, ncol = 3, byrow = TRUE, dimnames = list(c("x", "y"), 
    c("A","B","E")))

abun
    A   B   E
x 0.4 0.0 0.6
y 0.1 0.4 0.5

x<-data.frame("Trait1" =c(1,1,0,1),
                    "Trait2"=c(1,1,1,1),
                    "Trait3" =c(1,1,0,1),
                    "Trait4" =c(1,0,1,1))
rownames(x)<-c("A","B","C","D") 

x
  Trait1 Trait2 Trait3 Trait4
A      1      1      1      1
B      1      1      1      0
C      0      1      0      1
D      1      1      1      1               



if(any(colnames(abun) %in% rownames(x) != TRUE))
stop("The following species names in abun are missing trait information")

2 个答案:

答案 0 :(得分:2)

回到your earlier question

colnames(abun)[
    !colnames(abun) %in% rownames(x)
    ]

这应该返回您需要的值。

答案 1 :(得分:1)

这样的东西?

if(any(colnames(abun) %in% rownames(x) != TRUE))
stop("The following species names in abun are missing trait information:",
     paste(setdiff(colnames(abun), rownames(x)), collapse=" "))

感谢@Hadley建议setdiff!