Henrik

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Henrik has asked 17 questions and find answers to 396 problems.

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Henrik questions

Do we need to convert single elements of j to a list when the overall result of j is a list anyway?
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"?

Henrik answers

How can I add axis ticks for dates not present in my data using base R plot
Data management: flatten data with R
Order a data frame based on a column that points to the next record
Why indexing .SD with a number is faster than when the number is stored in a variable
How to connect several points from a fix point - R
How to averaging over a time period by hours?
Efficient method to filter and add based on certain conditions (3 conditions in this case)
Extract decreasing sequences with certain start and end values
counting elements in data frame and creating new colums
Karyogram and SNP with ggplot2 (geom_path, geom_bar, ggbio)