hadley

Houston, TX

had.co.nz

Age: 33

I'm chief scientist at RStudio.

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Where can I learn to how to write C code to speed up slow R functions?

r rcpp asked Nov 5 '10 at 13:20

stackoverflow.com

23 votes

Creating an academic portfolio with bibtex

bibtex asked Jun 29 '11 at 17:53

tex.stackexchange.com

22 votes

Preventing performance regressions in R

performance r testing asked Dec 11 '11 at 15:17

stackoverflow.com

11 votes

Which packages make good use of S4 objects?

r s4 asked Mar 25 '11 at 19:32

stackoverflow.com

8 votes

Blinding a latex paper

latex citations asked May 10 '09 at 15:57

stackoverflow.com

7 votes

Efficiently locate group-wise constant columns in a data.frame

r data.frame plyr asked Dec 27 '11 at 16:42

stackoverflow.com

6 votes

ActiveRecord::StatementInvalid: Could not find table 'tablename'

ruby-on-rails sqlite asked Mar 13 '09 at 21:29

stackoverflow.com

5 votes

Combined aggregated and non-aggregate query in SQL

sql aggregate-functions asked May 13 at 21:35

stackoverflow.com

5 votes

Subset by group with data.table

r data.table asked May 15 at 20:03

stackoverflow.com

Top Answers

102

How to make a great R reproducible example?

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What is the most useful R trick?

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Tricks to manage the available memory in an R session?

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Workflow for statistical analysis and report writing

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Counting the Number of Elements With The Values of x in a Vector?

stackoverflow.com

What core packages should a professional R developer have, and why?

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Structure of an R course for beginners

stackoverflow.com

R: speeding up “group by” operations

stackoverflow.com

Letter “y” comes after “i” when sorting alphabetically

stackoverflow.com

Learning R. Where does one Start?

stackoverflow.com

Linear Regression and group by in R

stackoverflow.com

How to avoid a loop in R: selecting items from a list

stackoverflow.com

Extract a regular expression match in R version 2.10

stackoverflow.com

Plotting two variables as lines using ggplot2

stackoverflow.com

Learning functional programming with R

stackoverflow.com

Counting non NAs in a data frame; getting answer as a vector

stackoverflow.com

Does column exist and how to rearrange columns in R data frame

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Extending ggplot2 properly?

stackoverflow.com

How can I determine if a function generates a graph

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How to use Outlier Tests in R Code

stackoverflow.com

Good reference for Roxygen?

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Expert R users, what's in your .Rprofile?

stackoverflow.com

group by in R, ddply with weighted.mean

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Sources on S4 objects, methods and programming in R

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Most used data wrangling methods/commands in R

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How do you use “<<-” (scoping assignment) in R?

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doMC vs doSNOW vs doSMP vs doMPI: why aren't the various parallel backends for 'foreach' functionally equivalent?

stackoverflow.com

SuperImpose Histogram fits in one plot ggplot

stackoverflow.com

What is your favorite data visualization blog?

stats.stackexchange.com

doing a plyr operation on every row of a data frame in R

stackoverflow.com