List vs df

2015-12-06 17:07:33 +04:00 · 2015-12-06 17:07:33 +04:00 · 129649eaed
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 1.  Generate the lists corresponding to these nested set diagrams.

 1.  What happens if you subset a data frame as if you're subsetting a list?
+    What are the key differences between a list and a data frame?

 ## A common pattern of for loops