Question

我正在尝试通过行名称获取R中的数据子集，但是我遇到了流动错误。

mydata是我的主要数据文件，我想通过行名获取它的子集。

我尝试的是：

data<-mydata[c("hsa-miR-150"   , "hsa-miR-16"    , "hsa-miR-192"  , ..`enter code here`.. )]

我得到了：error: unexpected string constant in "sa-miR-16" , "hsa-miR-192" ,.... 我也尝试过这个：

 attributes(Arow)
$levels
 [1] "hsa-miR-150"    "hsa-miR-16"     "hsa-miR-192"    "hsa-miR-194"    "hsa-miR-19a"   
 [6] "hsa-miR-19b"    "hsa-miR-22" 
> p<-matrix(nrow=16, ncol=1)
> p<-matrix(nrow=16, ncol=1, Arow)
> y<-mydata[p]
> dim(y)
>NULL

此外，即使这个简单的代码也不适合我！：

 y<-c("hsa-miR-150"   , "hsa-miR-16"    , "hsa-miR-192"   , "hsa-miR-194"   , "hsa-miR-19a", "hsa-miR-19b"   , "hsa-miR-22"    , "hsa-miR-223"   , "hsa-miR-23a"    ,"hsa-miR-23b" ,"hsa-miR-25"    , "hsa-miR-30b"    ,"hsa-miR-30c"   , "hsa-miR-425"   , "hsa-miR-486-5p" "hsa-miR-92a" )
Error: unexpected string constant in "sa-miR-16"    , "hsa-miR-192"   , "hsa-miR-194"   , "hsa-miR-19a",

有人可以告诉我，这里出了什么问题？！我该怎么办？

Answer 1

首先阅读：How to make a great R reproducible example?。

然后删除enter code here并在行列表后添加逗号：

data <- mydata[c("hsa-miR-150", "hsa-miR-16", "hsa-miR-192"), ]

然后你可以在这里添加缺少的逗号：

y <- c("hsa-miR-150", "hsa-miR-16", "hsa-miR-192", "hsa-miR-194",
       "hsa-miR-19a", "hsa-miR-19b", "hsa-miR-22", "hsa-miR-223",
       "hsa-miR-23a", "hsa-miR-23b", "hsa-miR-25", "hsa-miR-30b",
       "hsa-miR-30c", "hsa-miR-425", "hsa-miR-486-5p", "hsa-miR-92a" )

Answer 2

此错误通常与缺少语法有关，例如逗号或=。你的最后一个例子是缺少一个逗号，最后两个项目没有用逗号分隔。这有效：

y<-c("hsa-miR-150"   , "hsa-miR-16"    , "hsa-miR-192"   , "hsa-miR-194"   , "hsa-miR-19a", "hsa-miR-19b"   , "hsa-miR-22"    , "hsa-miR-223"   , "hsa-miR-23a"    ,"hsa-miR-23b" ,"hsa-miR-25"    , "hsa-miR-30b"    ,"hsa-miR-30c"   , "hsa-miR-425"   , "hsa-miR-486-5p", "hsa-miR-92a" )

与任何编程语言一样，R是一种形式语言，使用正确的语法非常重要。因此，在编写代码时，请仔细检查是否使用了正确的语法。

R中的子集数据

2 个答案: