MichaelChirico

MichaelChirico has asked 77 questions and find answers to 192 problems.

Stats

About

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

http://michaelchirico.github.io/

MichaelChirico questions

Conditional keyed join/update _and_ update a flag column for matches
Using colClasses and select arguments of fread simultaneously
Is Variable.get('x', deserialize_json=True) the same as Jinja '{{ var.json.x }}'?
How to define custom CSS within the document?
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)

MichaelChirico answers

Transform data.table with ranges of codes
assign the same value to multiple variables
X[Y] join syntax with the 'on' argument
How to set spaces in the column names of a table or data frame using xtable
System date in Posixlt and Posixct
Using colClasses and select arguments of fread simultaneously
R data.table return NA when using .I to get row number
Use dynamic names for CJ in data.table
Accessing a vector element by name in R when some names are duplicated
Get all possible permutations of a DNA sequence with an ambiguous base R