talat

talat has asked 13 questions and find answers to 304 problems.

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data scientist

talat questions

How to split a string by dashes outside of square brackets
dplyr group_by and summarize for two df's with same column name
Understanding sunburstR behaviour
Read nested folder and file names as nested list
Alternate geom_text position with hjust
Count combinations of length 2 per id
Add rows to grouped data with dplyr?
Subset observations that differ by at least 30 minutes time
Using dplyr summarise_at with column index
dplyr::group_by_ with character string input of several variable names

talat answers

The Fastest/Simplest Algorithm/Function to Determine Largest of Three Values
dplyr - conditional expansion of intervals
How to improve performance for huge datasets by substitute a "for-loop" and "if-else" clauses
R - speed up nested loops (vectorization?) with conditioning on differently sized sequences
Combining multiple columns into one
Remove a particular character from the end of each string
What is the most elegant way to apply a function to multiple pairs of columns in a data.table or data.frame?
Expand numeric vector elements with constant (natural number)
merging more than 2 data frames whilst assigning an identifier factor in R
Report first and last non-missing observation for variables