Hi there,
I want to find the intersection between two different data frame or
matrices based on two columns.
for example in matrix A I have 5 columns, the first two columns are Id1 and
Id2 and I have the same columns in the other matrix B, (Id1, Id2 ,,,)
how can I find the intersection between these two matrices based on columns
Id1 and Id2 in R?
Thanks
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