问题描述
我有一个数据框，正在使用 reshape2 包进行 dcast 删除，我想删除
I have a data frame which I am dcasting using the reshape2 package, and I would like to remove the first column and have it become the row names of the data frame instead.
原始数据帧，在 dcast 之前：
Original dataframe, before dcast:
> corner(df)
ID_full gene cpm
1 S36-A1 DDX11L1 0
2 S36-A1 WASH7P 0
3 S36-A1 MIR1302-2 0
4 S36-A1 FAM138A 0
5 S36-A1 OR4F5 0
pivot 函数删除表：
library(reshape2)
pivot <- function(x){
castTable <- x %>% dcast(ID_full ~ gene, value.var="cpm")
}
在 dcast 之后，包裹在我的轴中函数：
After dcast, wrapped in my pivot function:
> corner(df)
ID_full 1060P11.3 A1BG A1BG-AS1 A1CF
1 S36-A1 0 0 0 0
2 S36-A10 0 0 0 0
3 S36-A11 0 0 0 0
4 S36-A12 0 0 0 0
5 S36-A2 0 0 0 0
我希望ID_full成为行名，并不再作为列存在，在 dcasting 之后通过管道传输。我可以在多行代码中执行此操作，每次都替换数据帧，但是我想使用％>％运算符来全部完成操作。
I'd like ID_full to become the rownames, and to cease existing as a column, piped after dcasting. I can do this in several lines, replacing the data frame each time, but I'd like to do it all using the %>% operator.
我能想到的最佳尝试包括以下内容，但显然行不通：
The best attempt I can think of would involve something like this, but obviously it doesn't work:
library(dplyr)
df <- df %>% pivot(.) %>% with(., row.names=df[,1])
我将不胜感激任何建议……这种滋扰让我发疯！
I'd appreciate any suggestions... this nuisance is driving me crazy!
更新：
感谢您的回答：
这个表达式很好地工作：
This expression works nicely:
df <- df %>% pivot(.) %>% `rownames<-`(.[,1]) %>% select(-ID_full)
> corner(df)
1060P11.3 A1BG A1BG-AS1 A1CF A2M
S36-A1 0 0 0 0 0.00000
S36-A10 0 0 0 0 0.00000
S36-A11 0 0 0 0 0.00000
S36-A12 0 0 0 0 1.62189
S36-A2 0 0 0 0 1170.95000
推荐答案
会这样做吗？
iris %>% `rownames<-`(seq_len(nrow(iris)))
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