刪除數據框中列的特殊字符和數字

Question

我有一個數據框：

dput(Data1)
structure(list(Emp.ID = c(182038L, 191854L), Project.Acquired.Skill = structure(c(2L, 
1L), .Label = c("Architecting (10),Cognos TM1 (4),Support Function (3)", 
"SAS (76),SAS Analytics (76),SAS BI (76),SAS data modeling tool (63),ClearCase (18),SQL (18),SQL Server (18),SQL SERVER 2000 (18),SQL SERVER 2005 (18),Excel (16),Oracle (16),AS400 (10)"
), class = "factor")), .Names = c("Emp.ID", "Project.Acquired.Skill"
), class = "data.frame", row.names = c(NA, -2L))

str(Data1)
'data.frame':   2 obs. of  2 variables:
 $ Emp.ID                : int  182038 191854
 $ Project.Acquired.Skill: Factor w/ 2 levels "Architecting (10),Cognos TM1 (4),Support Function (3)",..: 2 1  

我有一列是具有這樣的值的因子，例如Architecting (10),Cognos TM1 (4),Support Function (3)並且我需要剝離數字（0-9），WhiteSpace和括號（）以獲得Architecting,Cognos TM1,Support Function 。 我正面臨問題，因為這被編碼為因素。
我的輸出應如下所示

Emp ID  Project Acquired Skill
182038  SAS,SAS Analytics,SAS BI,SAS data modeling tool,ClearCase,SQL,SQL Server,SQL SERVER 2000,SQL SERVER 2005,Excel,Oracle,AS400
191854  Architecting,Cognos TM1,Support Function

Answer 1

在gsub使用字符類regexp：

transform(Data1, Project.Acquired.Skill=gsub("\\s[0-9()]+","",Project.Acquired.Skill))
  Emp.ID
1 182038
2 191854
                                                                                             Project.Acquired.Skill
1 SAS,SAS Analytics,SAS BI,SAS data modeling tool,ClearCase,SQL,SQL Server,SQL SERVER,SQL SERVER,Excel,Oracle,AS400
2                                                                          Architecting,Cognos TM1,Support Function

Answer 2

(data1[,2] <- gsub("\\s\\(\\d+\\)", "", data1[,2]))
# [1] "SAS,SAS Analytics,SAS BI,SAS data modeling tool,ClearCase,SQL,SQL Server,SQL SERVER 2000,SQL SERVER 2005,Excel,Oracle,AS400"
# [2] "Architecting,Cognos TM1,Support Function"

Answer 3

library(qdap)
gsub(" ,", ",", strip(Data1[, 2], char.keep=",", lower=F))

## [1] "SAS,SAS Analytics,SAS BI,SAS data modeling tool,ClearCase,SQL,SQL Server,SQL SERVER ,SQL SERVER ,Excel,Oracle,AS"
## [2] "Architecting,Cognos TM,Support Function"