小编Sha*_* A.的帖子

首先，如果这个问题太天真或者之前已经重复过，我深表歉意。我试图在论坛中找到它，但我将其作为问题发布，因为我未能找到答案。

我有一个数据框，其列名称如下；

head(rownames(u))

[1] "A17-R-Null-C-3.AT2G41240"       "A18-R-Null-C-3.AT2G41240"         "B19-R-Null-C-3.AT2G41240"      
[4] "B20-R-Null-C-3.AT2G41240"       "A21-R-Transgenic-C-3.AT2G41240" "A22-R-Transgenic-C-3.AT2G41240"

我想要的是使用 R 中的正则表达式来提取第一个破折号和最后一个句点之间的字符串。

预期结果是，

[1] "R-Null-C-3"       "R-Null-C-3"         "R-Null-C-3"      
[4] "R-Null-C-3"       "R-Transgenic-C-3" "R-Transgenic-C-3"

我尝试跟随但没有运气......

gsub("^[^-]*-|.+\\.","\\2", rownames(u))
gsub("^.+-","", rownames(u))
sub("^[^-]*.|\\..","", rownames(u))

有人可以帮助我解决这个问题吗？

预先非常感谢。

沙尼.

首先,如果我在发布之前没有遇到类似问题的答案,那么首先道歉.我有一组(72)基因注释文件.我想以下面的格式提取GO术语(奖金将是其他注释术语)

HORVU1Hr1G002090           GO:0003824
HORVU1Hr1G002090           GO:0006527
HORVU1Hr1G002090           GO:0008295
HORVU1Hr1G002090           GO:0008792
HORVU1Hr1G005360           GO:0004497
HORVU1Hr1G005360           GO:0005506
HORVU1Hr1G005360           GO:0016705
HORVU1Hr1G005360           GO:0020037
HORVU1Hr1G005360           GO:0055114
HORVU1Hr1G087600           GO:0009055
HORVU1Hr1G087600           GO:0015035
HORVU1Hr1G087600           GO:0016705
.
.
.

我的input_file看起来像这样:

HORVU1Hr1G002090.11 HORVU1Hr1G002090    chr1H:4283580-4286133   HC_G    arginine decarboxylase 1    GO:0003824, GO:0006527, GO:0008295, GO:0008792  PF00278, PF02784    IPR000183, IPR002985, IPR009006, IPR022643, IPR022644, IPR022657, IPR029066 HORVU1Hr1G002090
HORVU1Hr1G005360.1  HORVU1Hr1G005360    chr1H:11579708-11582804 HC_G    Cytochrome P450 superfamily protein GO:0004497, GO:0005506, GO:0016705, GO:0020037, GO:0055114  PF00067 IPR001128, IPR002403, IPR017972    HORVU1Hr1G005360
HORVU1Hr1G087600.1  HORVU1Hr1G087600    chr1H:539679073-539680597   HC_G    Glutaredoxin family protein GO:0009055, GO:0015035, GO:0045454  PF00462 IPR002109, …