Jaap

Jaap has asked 13 questions and find answers to 307 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

Plot geocode: ggmap error
ggplot2: how to create correct legend after using scale_xx_manual
Find all the zeroes over a diagonal of a data frame
Need first instance only when joining two tables using data.table's :=
How to specify different palettes and line size within a single ggplot2 plot
Summarising levels of multiple factor variables
Change stacking order in ggplot stacked area graph
How to use data.table to efficiently calculate allele frequencies (proportions) by group across multiple columns (loci)
ggplot with full data and subset(s) along x-axis
Processing a variable space delimited file limited into 2 columns