How to operate non-numeric column?

[humility3239]

I can convert Majority.Protein.IDs into one reviewed ID for each row in R. In perseus, Expression columns and one Majority.protien.IDs column were input as main column. However, the Majority.Protein.IDs were not considered as numeric when using Rscipt.

So, how can I convert Majority.protein.IDs into one reviewed ID for each row in Perseus?