Kevin Ushey

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Kevin Ushey has asked 13 questions and find answers to 127 problems.

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Kevin Ushey questions

How do I substitute symbols in a language object?
Slice a string at consecutive indices with R / Rcpp?
How does Roxygen to handle infix binary operators (eg. %in%)?
How can I control the x position of boxplots in ggplot2?
Why is sapply relatively slow when querying attributes on variables in a data.frame?
Produce two plots from same chunk / statement in knitr
How should I count the number of unique rows in a 'binary' matrix?
Strange mixing of system + homebrew Python with LLDB
How do I prevent "r 'library' or 'require' calls not declared" warnings when developing a package?

Kevin Ushey answers

Iterate over S4 object slots Rcpp
'unlockEnvironment' implemented via 'Rcpp' instead of 'inline'
Risk in deleting suspended session data?
Submitting R package that use OpenMP
Extract data elements found in a single column
Error when installing "devtools" package for R in Ubuntu
Fast vectorized function to check if a value is in an interval
Rcpp map/dictionary/list
Adaptive moving average - top performance in R
Define what makes a code section in rstudio