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MichaelChirico
Julia, R, Python, QGIS, SAGA, STATA, MATLAB neophyte.
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Top Questions
86
votes
How exactly does R parse `->`, the right-assignment operator?
r
yacc
asked Jan 4, 2016 at 20:11
stackoverflow.com
42
votes
Read SAS sas7bdat data into R
r
r-faq
asked May 2, 2015 at 19:58
stackoverflow.com
24
votes
Does 左様なら (sayōnara) have Chinese roots?
etymology
greetings
asked Jun 3, 2020 at 8:35
japanese.stackexchange.com
21
votes
Installing a package offline from GitHub
r
asked Oct 16, 2015 at 20:36
stackoverflow.com
20
votes
Why do `as` methods remove vector names, and is there a way around it?
r
type-conversion
asked Jan 7, 2016 at 5:00
stackoverflow.com
20
votes
Adding a footnote / thanks to Rmarkdown title slide
r
knitr
rmarkdown
pandoc
beamer
asked Feb 5, 2016 at 16:19
stackoverflow.com
17
votes
What is an inch? Setting the length for arrows
r
plot
asked Oct 31, 2017 at 12:00
stackoverflow.com
16
votes
Efficiently counting non-NA elements in data.table
r
data.table
asked Apr 16, 2015 at 19:01
stackoverflow.com
14
votes
How can I tell which packages I am not using in my R script?
r
packages
asked Apr 2, 2015 at 14:35
stackoverflow.com
14
votes
What is the purpose of the "religion" field on the Vietnam EVisa application?
visas
vietnam
religion
asked Mar 12, 2018 at 14:59
travel.stackexchange.com
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Top Answers
115
What does .SD stand for in data.table in R
stackoverflow.com
97
What to do about students who miss my lectures and then want me to repeat entire material?
academia.stackexchange.com
93
V.I. Arnold says Russian students can't solve this problem, but American students can -- why?
math.stackexchange.com
80
In a right triangle, can $a+b=c?$
math.stackexchange.com
75
Speeding up the performance of write.table
stackoverflow.com
67
Use of lapply .SD in data.table R
stackoverflow.com
55
Read SAS sas7bdat data into R
stackoverflow.com
39
Faster way to read fixed-width files
stackoverflow.com
38
Is the sum of two white noise processes necessarily a white noise?
stats.stackexchange.com
33
R: how to check whether a vector is ascending/descending
stackoverflow.com
29
Converted xxx-eps-converted-to.pdf not found
tex.stackexchange.com
29
Did close to 3,000 Puerto Ricans die in Hurricane Maria?
skeptics.stackexchange.com
27
Find the value of a function whose derivative is zero
math.stackexchange.com
27
How do people perform mental arithmetic for complicated expressions?
math.stackexchange.com
26
How to quickly form groups (quartiles, deciles, etc) by ordering column(s) in a data frame
stackoverflow.com
26
Why does it take more time for data.table::fread to read a file when filename is specified differently?
stackoverflow.com
25
Elegant way to check for missing packages and install them?
stackoverflow.com
25
Read an Excel file directly from a R script
stackoverflow.com
23
The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or dataframe
stackoverflow.com
22
How can I view the source code for a function?
stackoverflow.com
21
Lower case for a (factor) data frame column
stackoverflow.com
21
Replace values in a dataframe based on lookup table
stackoverflow.com
18
reshape wide to long using data.table with multiple columns
stackoverflow.com
17
Most efficient way of exporting large (3.9 mill obs) data.frames to text file?
stackoverflow.com
16
Select first and last row from grouped data
stackoverflow.com
15
What is the difference between extraction via $ and @ in R?
stackoverflow.com
14
R: By group, test if for each value of one variable, that value exists in another variable
stackoverflow.com
14
Draw lines between all the coordinates in a plot
stackoverflow.com
13
What do . (dot) and % (percentage) mean in R?
stackoverflow.com
12
How can I tell which packages I am not using in my R script?
stackoverflow.com
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