Welcome! We run a number of educational workshops primarily focused on statistical data analysis with freely available materials (note: this page is still a bit under construction):

Intermediate/Advanced Statistical Analysis Workshops
uSTAR R workshops

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Intermediate/Advanced Statistical Analysis Workshops

Ongoing workshops in advanced analysis topics, using R. For more information, contact Mike Rieger (mrieger @ wustl . edu). Topics include:

Hypothesis Testing: Linear models with interactions and post-hoc comparisons in R

– understanding contrast coding, the design matrix, and the output of lm()

– using the multcomp package to print summaries of post-hoc comparisons & adjusted significance

– interactions between continuous and categorical variables

– models with fixed & random effect terms

In this 5 week session you will become comfortable with:

Working directly with the design matrix

Working directly with the variance-covariance matrix

Performing linear algebraic operations in R

Different approaches to multiple comparisons correction

Computing, interpreting, and reporting confidence intervals for regression coefficients & mean differences

Data/Materials

Session Tutorial #1

Two way interactions 1.pdf

rgbeta.R Simulation Function for ESS score data: rgbeta.R

Simulated ESS Score data: ESSData.tab

multcomp package

broom package

car package

Additional examples for the multcomp package (super useful): https://cran.r-project.org/web/packages/multcomp/vignettes/multcomp-examples.pdf

Session Tutorial #2: Two Way Interactions with Categorical & Continuous Variables

Simulated Lever Press Data from Ozburn et al. 2012 Psychopharmacology: ozburn2012.tab

Discovery Approaches: Linear models with unknown numbers of predictors

– understanding predictors and multiple collinearity of predictors

– model selection criteria: Bayesian probability and marginal likelihood approaches

– algorithms for model selection: enumeration & random walks

– dimensionality reduction in the predictor space: principal component analysis (PCA)

– dimensionality reduction in both the predictor & the response space: partial least squares regression (PLSR)

– summary statistics, what to report, what is the best model?

– prediction using Bayesian model averaging

In this 5 week session you will build on the previous and become comfortable with:

Rotating and transforming matrices in R

Scaling approaches for variables

Simple introduction to Bayesian probability

Working with model likelihood

Criteria for model selection: R^2, Akaike Information Criterion (AIC), Bayesian Information Criterion (BIC), Bayes Factor

Scree plots, loading plots, scores plots to evaluate PCA and PLSR techniques

Numerical Approaches: Empirical sampling methods

– basics of Monte Carlo sampling and computing confidence intervals for a sample statistics

– Markov Chain Monte Carlo methods (MCMC)

– Monte Carlo methods for linear models

– MCMC methods for non-linear models

– Enzyme kinetics

– Exponential growth models

– Count data

– Survival curves

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uSTAR R Workshops

Introductory data analysis workshops using R for uSTAR scholars, a scholarship program at Washington University in St. Louis for undergraduate students in STEM fields who come from historically underrepresented backgrounds (click link to read more). Currently this is a two-part series 11/30/2016 & 12/7/2016 but may continue in the future depending on program interest. We have had numerous uSTAR scholars in our lab over the years, so if you are interested in our work feel free to contact us.

Datasets for 11/30/2016

NOAA.gov GSOD

Global Summary of Day Data were downloaded and processed using these scripts: download.all.years & process.and.format.gsod.R, and the full FTP directory listing for GSOD data at NOAA.gov. We will use basic R base functions to learn the basic features of variable assigment and operations, linear algebra, and learn to do basic data exploration and plotting.

Global Summary of Day Weather Station Data (NCEI Climate Data Server)

200460-99999.output.tab	Polargmo Krenkelja (Arctic)
213580-99999.output.tab	Zohova Island (Arctic)
361260-99999.output.tab	Bajanaul Station (Bayanaul, Kazakhstan)
431850-99999.output.tab	Machilipatnam (India)
610240-99999.output.tab	Agadez (Niger)
619020-99999.output.tab	Ascension Station (Southern Atlantic Ocean)
893240-99999.output.tab	Byrd Station (Antarctica)
949960-99999.output.tab	Norfolk Island (South Pacific)

To download, right click and choose Save Link As… Or download all at once with this zip file.

Datasets for 12/7/2016

Downloading Genomic Sequence Data using the BSgenome R package

Image result for under construction

Workshops