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Answer by Uwe for Match observations in two dataframes in R

The OP has requested to find setID groups in df2 where the values in col1 are exactly the same as in df2.For the sake of completeness, here is also a data.table approach:library(data.table)tmp <-...

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Answer by Onyambu for Match observations in two dataframes in R

using base R:split(df2,df2[,1])[by(df2[2],df2[1],function(x)all(x==df1))] $`1` setID col1 1 1 apples 2 1 oranges 3 1 apples 4 1 banana

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Answer by A5C1D2H2I1M1N2O1R2T1 for Match observations in two dataframes in R

You might want to look at the "compare" package, which would allow you to compare allowing for different transformations.Here are a couple of examples to consider....Starting sample data. Note setID ==...

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Match observations in two dataframes in R

I have two dataframes. I want to use elements from one dataframe to search through a column from the other dataframe. And I need to narrow down this dataframe by the matches. And then continue...

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