Justin

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Justin has asked 15 questions and find answers to 147 problems.

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Justin questions

data.table's tables() function runs some of my .Rprofile functions
multiple django apps with nginx proxy_pass and rewrite
fixed "number" of plots using facet_wrap
Convert a factor column to multiple boolean columns
merge a data.table with itself after a reference lookup
Access `by` variable from within `j` in data.table
Ordering 1:17 by perfect square pairs
create an expression from a function for data.table to eval
Reading data from PDF files into R

Justin answers

How to remove regular expressions in a string in R?
Merge Duplicates based on column?
Subset a factor by NA levels
R summary function in ddply (plyr) in a simple way
R: How to make transformations on subset of a subset fast (optimize or alternative to `ddply`)?
R - How to Remove Items in a Vector that Satisfy One of Several Conditions
Emacs ESS evaluating slower than normal R
Replace NA with mean matching the same ID
How can I derive a variable in R showing the number of observations that have the same value recorded at earlier dates?
Creating an ID variable based on 3 common variables in R