Hadley Wickham 7a74e6a1db Add some explanatory text + diagrams		2022-03-03 10:14:00 -06:00
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cell-values.png	Add some explanatory text + diagrams	2022-03-03 10:14:00 -06:00
column-names.png	Add some explanatory text + diagrams	2022-03-03 10:14:00 -06:00
variables.png	Add some explanatory text + diagrams	2022-03-03 10:14:00 -06:00