I have a dataframe obtained using read.csv from an excel file. Its first
column is times, running from 18:00 to 19:30. If I want to plot other columns
against time, do I need to convert those somehow, and how would I do that?
If I run plot(b$time,b$myvar) I get a decent plot, but a friend suggests that R
is just treating those numbers as text, and putting them in alphabetical order.
True?
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