comparing two files

Hi there

I have two object on is a vector T and the other is  dataframe C.
vector T has more no of rows when comapred with a dataframe Ccolumn[,2].I
want to find the the missing rows in dataframe C.That is those values that
are not matchig  in dataframe C[,2]

Kindly give me suggestion on how to go about it.

Ramya

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