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- abstractions with higher order functions?
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I am a postdoctoral researcher in statistical genetics at Mount Sinai School of Medicine, New York. Besides but not unrelated to that I work on side projects similar to this blog to explore other subjects in statistics and computer programming. You can see and hear my peculiar Hungarian name on Forvo and visit me on LinkedIn.
Hover above an symbol to reveal abstract. Click to read whole article.
Oct 17, 2017
Decision tree model is fitted to toy data on homes in New York and San Francisco (NY, SF). Along the way overfitting is illustrated. The optimally fitted tree is used to classify some test data as either NY or SF.
Fixed and Mixed Regression Models
Oct 16, 2017
Fixed and mixed models are fitted to the sleepstudy dataset to investigate how human reaction slows down with sleep deprivation.
Substitution vs Switch
Nov 20, 2016
- general task: evaluate arbitrary elements of a sequence of expressions
- specific task: produce normal Q–Q plots for a sequence of distributions
- two implementation strategies are discussed: one based on
switchand another on
substitutedemands more abstract programming but affords more flexibility
Iteration: Loops vs Functional Programming
Aug 13, 2016
Iterative processes are characterized by successive steps forming a sequence of states captured by state variables. In each step the state variables are updated based on themselves and some rule. Iteration is often implemented using control-flow constructs like the
while loop (see
?Control for help).
Reshaping Data from Longitudinal and Factorial Experiments
Jul 14, 2016
Graphic packages like
ggplot2 work best when data are presented in long format as opposed to wide format into which data are typically imported and in which it is usually convenient to perform calculations. For example
morley is a data frame in long format, which allows functions like
lattice::xyplot to receive simple formulas and yet produce a complex trellis display.