Identifying dataframe columns by their first few characters

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暗喜 2021-01-23 06:46

I have a dataframe in which the column names begin with certain characters:

> colnames(df)
[1] \"p.crossfencing\"  \"p.livestockdrinking\"  \"v.livestocktrai


      
      
        
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                   执笔经年
                                             
                
                
                (楼主)
            
              
              
                2021-01-23 07:10
              

            
            
                        
Are you looking for df[,grep("^v.",names(df))]?
    
             
                                                        
            
            
              
                
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