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S was first released in 1973 but data frames were added almost two decades later, as mentioned in another comment. They were reimplemeted -a few years later- in
by kgwgk 4y ago
S was first released in 1973 but data frames were added almost two decades later, as mentioned in another comment. They were reimplemeted -a few years later- in R and served as inspiration -a decade later- for pandas.
- disgruntledphd2 4y agoYeah, I know. Apologies I was on mobile, and didn't want to look up which S Book data.frames were in.