Henrik

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Henrik has asked 16 questions and find answers to 352 problems.

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Henrik questions

Expanding window (cumulative calculation) in data.table: how to improve performance
Subset a list - a plyr way?
Remove legend labels using label = FALSE in guide_legend, or labels = NULL in discrete_scale
Brew and knit one PDF report split by variable with special characters (å æ ø) - encoding issue
Parse dates in format dmy together with dmY using parse_date_time
Changing factor levels on a column with setattr is sensitive for how the column was created
Use `j` to select the join column of `x` and all its non-join columns
Align different plot shapes
How to avoid that anytime(<numeric>) "updates by reference"?
How is order determined in the result of a non-equi join?

Henrik answers

Specifying colour, transparency and position of arrows (line segments) in ggbiplot
Can I fix overlapping dashed lines in a histogram in ggplot2?
Add separate legend for geom_vline
Applying scale_fill_gradient in ggplot2 conditionally
Remove all records that have duplicates based on more than one variables
Lagging variable by group does not work in dplyr
Object size increases hugely when transposing a data frame
Identify at least N contiguous cells that match a certain criteria, in a grid
Creating xts object with multiple columns
How can I create a custom colour scale using ggplot2 and geom_tile?