Jaap

Jaap has asked 13 questions and find answers to 335 problems.

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My data.table-tutorial files.

Jaap questions

How do I connect the endpoint & startpoint of geom_line in a polar plot (coord_polar)?
How to prevent data.table to force numeric variables into character variables without manually specifying these?
Odd behavior when joining with multiple conditions
Melt a dataframe by pattern in colnames
Replace empty values with value from other column in a dataframe
How to extract keywords from Google search results page URL?
How to fill geom_polygon with different colors above and below y = 0?

Jaap answers

sharing 2 data tables through sendmailR
Calculate amount of occurences for column per category
Grouping and Counting instances?
ggplot legend for colour with auxiliary variable
How to compare the two time intervals in R? [duplicate]
How to calculate time difference in consecutive rows
Find nearest value by group
How to tidy this dataset?
ggmap, using coord_cartesian pushes all points to the north
R cleaning csv file