我想访问一个表,但是表的名称存储在一个变量中。
如何使用此变量读取表?
示例:
DATA1 <- data.frame(SR = c(1:10), VALUE = seq(1,100,10)) #### has 10 rows
DATA2<- data.frame(SR = c(1:11), VALUE = seq(1,110,10)) #### has 11 rows
DATA3<- data.frame(SR = c(1:12), VALUE = seq(1,120,10)) #### has 12 rows
##### ---- list of data table
DATA_TABLE_LIST <- list(DATA1,DATA2,DATA3)
#### ----- given names to elements of list
names(DATA_TABLE_LIST) <- c("DATA1","DATA2","DATA3" )
#### ---- identify element of list which has minimum rows
TABLE_NAME <- names(DATA_TABLE_LIST)[which( sapply(DATA_TABLE_LIST,nrow) == min(sapply(DATA_TABLE_LIST,nrow)))]
#### ---- 'TABLE_NAME' stores the name of a datatable which has the minimum rows ( in this case it is DATA1)
如何使用存储在“ TABLE_NAME”中的名称访问数据表?
答案 0 :(得分:0)
虽然我建议您使用列表,但您始终可以使用
> get(TABLE_NAME)
SR VALUE
1 1 1
2 2 11
3 3 21
4 4 31
5 5 41
6 6 51
7 7 61
8 8 71
9 9 81
10 10 91
要使用列表,您可以
> DATA_TABLE_LIST[TABLE_NAME]
$DATA1
SR VALUE
1 1 1
2 2 11
3 3 21
4 4 31
5 5 41
6 6 51
7 7 61
8 8 71
9 9 81
10 10 91