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Top Questions
21
votes
Simultaneously access environment from two R sessions
r
shiny
r6
asked Jul 8, 2015 at 18:50
stackoverflow.com
18
votes
Sub-assign by reference on vector in R
r
data.table
r6
asked May 20, 2015 at 8:26
stackoverflow.com
17
votes
Adaptive moving average - top performance in R
r
data.table
zoo
mapply
rollapply
asked Jan 26, 2014 at 19:36
stackoverflow.com
17
votes
RStudio project and git repository in subdirectory
r
git
rstudio
devtools
asked Mar 12, 2015 at 22:38
stackoverflow.com
16
votes
raise a NOTE exception during R CMD check
r
cran
r-package
asked Feb 6, 2016 at 15:26
stackoverflow.com
14
votes
R render Rd using roxygen2 without roxygen2 version
r
devtools
roxygen2
asked Apr 18, 2015 at 0:17
stackoverflow.com
14
votes
R vectorized array data manipulation
arrays
r
vector
matrix
asked Jun 19, 2013 at 22:24
stackoverflow.com
13
votes
Star schema, normalized dimensions, denormalized hierarchy level keys
data-modeling
data-warehouse
database-normalization
star-schema
data.cube
asked Feb 18, 2016 at 4:05
stackoverflow.com
13
votes
Query Postgres table by Block Range Index (BRIN) identifier directly
sql
postgresql
postgresql-9.5
asked Jan 16, 2016 at 11:24
stackoverflow.com
12
votes
Recommended way to install regular(cli) .deb packages on Ubuntu Phone?
ubuntu-touch
asked May 7, 2015 at 20:21
askubuntu.com
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Top Answers
91
How to join (merge) data frames (inner, outer, left, right)
stackoverflow.com
51
R install packages from Shell
stackoverflow.com
41
Grouping functions (tapply, by, aggregate) and the *apply family
stackoverflow.com
35
How to avoid warning when introducing NAs by coercion
stackoverflow.com
31
Calculating moving average
stackoverflow.com
28
Is pandas now faster than data.table?
datascience.stackexchange.com
27
data.table merge by multiple columns
stackoverflow.com
25
Fastest way to replace NAs in a large data.table
stackoverflow.com
24
Adaptive moving average - top performance in R
stackoverflow.com
23
Read and write csv.gz file in R
stackoverflow.com
21
R: data.table cross-join not working
stackoverflow.com
21
How to order data within subgroups in data.table R
stackoverflow.com
18
R xts and data.table
stackoverflow.com
17
Reorder rows in data.table in a specific order
stackoverflow.com
17
Manipulation of Large Files in R
stackoverflow.com
16
Aggregating sub totals and grand totals with data.table
stackoverflow.com
13
Use merge() to update a data frame with values from a second data frame
stackoverflow.com
12
How can one work fully generically in data.table in R with column names in variables
stackoverflow.com
12
Why were pandas merges in python faster than data.table merges in R in 2012?
stackoverflow.com
12
Replace NAs with mean of the same column of a data.table
stackoverflow.com
10
data.table - summarizing data - difference between `by` and `keyby`?
stackoverflow.com
10
Subset data table without using <-
stackoverflow.com
10
Changing column names of a data frame
stackoverflow.com
10
How do I replace NA values with zeros in an R dataframe?
stackoverflow.com
10
What are helpful optimizations in R for big data sets?
stackoverflow.com
10
R data.table join: SQL "select *" alike syntax in joined tables?
stackoverflow.com
9
apply multiple functions in sapply
stackoverflow.com
9
Efficiently counting non-NA elements in data.table
stackoverflow.com
9
Progress bar in data.table aggregate action
stackoverflow.com
9
How to do non-equi join with variable column name
stackoverflow.com
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