eddi

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eddi has asked 47 questions and find answers to 392 problems.

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eddi questions

R vs sed regex greediness
eval and substitute in C/C++
data.table join and j-expression unexpected behavior
fast conversion from string time to milliseconds
constructing an identifier string for each row in data
can I switch the grouping variable in a single dplyr statement?
initializer list constructor error with CRTP
how can I mutate in dplyr without losing order?
display only plotted data in the legend
data.table and table unexpected behavior

eddi answers

data.table. Fast way to count number of changes within every column
R: Combining identical rows into one (preferably using dplyr/tidyr) [duplicate]
Row wise merge comma separated values in a `data.table`
R: sequentially assign number based on factor to a limit, then repeating sequence until end
Avoiding a loop on a strsplit list
Generalized function to substitute all variables in the quote()d expression, if they exist in an environment [duplicate]
Unlist and retain list names intact in R
Diagonal of a 3D array
R, dplyr: Collapse character variable elements by group if there is only one unique non-NA element per group
R - data.table rolling join confusion