How can I make a list of all dataframes that are in my global environment?

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This function should return a proper list with all the data.frames as elements

dfs <- Filter(function(x) is(x, "data.frame"), mget(ls()))

then you can rbind them with

do.call(rbind, dfs)

Of course it’s awfully silly to have a bunch of data.frames lying around that are so related that you want to rbind them. It sounds like they probably should have been in a list in the first place.

I recommend you say away from assign(), that’s always a sign things are probably afoul. Try

temp <- list.files(pattern="*.csv")
dfs <- lapply(temp, read.csv)

that should return a list straight away.

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