Hello, 
thank you for accepting me into the list.

I have the following dataframe:

   row.names  X           Y       Z     000_001  000_002  000_003
1                    sample                     sample    sample     sample
2                    sample2                   Au5         Au32       Au5
3                    sample3                   C              C             C
4                    ...........  
..
..n                    ............                    ....            .......         ............


I would like to select al the columns that have Au5 and C.
thank you in advance for your help,
james


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