MichaelChirico

MichaelChirico has asked 72 questions and find answers to 172 problems.

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About

R, Python, Spark, Presto, Julia, QGIS, SAGA, STATA, MATLAB neophyte.

http://michaelchirico.github.io/

MichaelChirico questions

dcast renaming all variables to start with a number
Why is it faster to evaluate in `j` than with `$` in a `data.table`?
How does RStudio determine the console width, and why does it seem to be getting it consistently wrong?
Assignment via `:=` in a for loop (R data.table)
Why do which and Sys.which return different paths?
Removing "NUL" characters (within R)
Remove all objects of a given type in R
while TRUE + break in a sub-environment
Allocating equal plot space to all of multiple plots with shared axes
Translating Stata to R: collapse

MichaelChirico answers

Filter data.table by quantity of group
R Convert List Into Data.Frame or Table
R data.table fread select with a partial string match?
Increase paste speed of two columns in data.table in R (reproducible)
Modification of expand.grid function in R
Find the largest n unique values and their frequencies in R and Rcpp
update one column twice in a data.table efficient in R
Get number of same individuals for different groups
data.table::fread an `integer64` type, manually override colClass for only one column
data.table get N most frequent values by group