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Stack Exchange

Henrik

Zürich, Switzerland

http://singmann.org

Postdoc (Psychology) at the University of Zürich, Switzerland.

My primary programming language is R.
I am maintainer of R packages afex, MPTinR, and acss.

Besides R, I use Python for running experiments (using PsychoPy) and occasionally other languages.

A list of my publications can be found on my homepage (usually with possibility to download the papers, data, and analysis scripts).

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Top Questions
148 votes

Plot a legend outside of the plotting area in base graphics?

r plot legend asked Oct 14 '10 at 10:01
stackoverflow.com

66 votes

How to efficiently use Rprof in R?

r profiling profiler asked Sep 6 '10 at 10:50
stackoverflow.com

66 votes

What are the possible dimensions / sizes / units LaTeX understands?

dimensions units unit-of-measure dimension-expressions asked Jan 17 '12 at 14:27
tex.stackexchange.com

57 votes

What is the most pythonic way to pop a random element from a list?

python list random pop asked Apr 6 '12 at 19:08
stackoverflow.com

55 votes

Which permutation test implementation in R to use instead of t-tests (paired and non-paired)?

r t-test nonparametric permutation-test asked Jan 10 '11 at 12:10
stats.stackexchange.com

54 votes

Which pseudo-$R^2$ measure is the one to report for logistic regression (Cox & Snell or Nagelkerke)?

logistic goodness-of-fit r-squared asked Oct 13 '10 at 16:12
stats.stackexchange.com

52 votes

Does it make sense to add a quadratic term but not the linear term to a model?

regression polynomial asked May 18 '12 at 13:34
stats.stackexchange.com

35 votes

Is there a way to use two '…' statements in a function in R?

function r argument-passing optional-arguments asked Nov 8 '10 at 14:49
stackoverflow.com

33 votes

What is compound symmetry in plain english?

correlation anova mixed-model lme asked Sep 2 '11 at 8:42
stats.stackexchange.com

32 votes

Maximal Length of List to Shuffle with Python random.shuffle?

python random shuffle asked Jun 17 '10 at 14:48
stackoverflow.com

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Top Answers
127
What is your favorite “data analysis” cartoon?
stats.stackexchange.com

86
Get column index from label in a data frame
stackoverflow.com

86
Change the spacing of tick marks on the axis of a plot?
stackoverflow.com

84
What is your favorite “data analysis” cartoon?
stats.stackexchange.com

50
How to efficiently use Rprof in R?
stackoverflow.com

49
What is your favorite “data analysis” cartoon?
stats.stackexchange.com

44
Famous statistical quotations
stats.stackexchange.com

37
How to read in numbers with a comma as decimal separator?
stackoverflow.com

35
Regarding p-values, why 1% and 5%? Why not 6% or 10%?
stats.stackexchange.com

32
When conducting a t-test why would one prefer to assume (or test for) equal variances rather than always use a Welch approximation of the df?
stats.stackexchange.com

31
How to represent an unbounded variable as number between 0 and 1
stats.stackexchange.com

26
Example reports for mixed-model analysis using lmer in biology, psychology and medicine?
stats.stackexchange.com

24
Will declining a research award be problematic for me, or other people?
academia.stackexchange.com

22
Passing column name as parameter to function in R language
stackoverflow.com

20
Post-hocs for within subjects tests?
stats.stackexchange.com

20
Post hoc test after ANOVA with repeated measures using R
stats.stackexchange.com

18
What is the minimum recommended number of groups for a random effects factor?
stats.stackexchange.com

18
How to perform a 4 by 4 mixed ANOVA with between- and within-subjects contrasts using R?
stats.stackexchange.com

18
igraph axes xlim ylim plot incorrectly
stackoverflow.com

17
How to display error bars for cross-over (paired) experiments
stats.stackexchange.com

16
How to test hypothesis of no group differences?
stats.stackexchange.com

16
How do Rpy2, pyrserve and PypeR compare?
stackoverflow.com

15
How do I vertically stack two graphs with the same x scale, but a different y scale in R?
stats.stackexchange.com

14
psych - Getting factor loadings as data.frame for LaTeX export
stackoverflow.com

14
If the t-test and the ANOVA for two groups are equivalent, why aren't their assumptions equivalent?
stats.stackexchange.com

14
Can you say that statistics and probability is like induction and deduction?
stats.stackexchange.com

12
Whether to use structural equation modelling to analyse observational studies in psychology
stats.stackexchange.com

12
Is there an alternative to the Kolmogorov-Smirnov test for tied data with correction?
stats.stackexchange.com

12
Is there a way to maximize/minimize a custom function in R?
stats.stackexchange.com

12
What is a “saturated” model?
stats.stackexchange.com

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