5 Important R-functions

5.1 Data preparation

We think the following R-functions are useful for checking whether data contains typo or other mistakes:

hist, table, plot, boxplot, scatter.smooth

5.2 Figures

There is a lot of online material to learn how to produce nice graphics with R, here some tips by a colleague of us (who does not think it is necessary to mention his name here, but thanks, Steffen!):

• The ggplot2-book introduces the background of ggplots. It is the reference ot consult for getting an understanding on how ggplot works.

• The R graph gallery is a user-friendly look-up sheet providing a lot of example code.

• This is the book to the R graph gallery mentioned above.

• And here is another graphics book