I have tried the merge function to merge two csv files that I imported. They both have the same variable names and data types but each time I run merge all that I get is an object that contains the names of the two data frames. I have tried the following:

# ex1
obj <- merge(obj1, obj2, by=obj)
# ex2
obj <- merge(obj1, obj2, all)

and several other iterations of the above.

Is merge the correct function? If so, what am I doing wrong?