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Friday, June 22, 2018 1:30 pm - 4:00 pm EDT (GMT -04:00)

Introduction to Regression Analysis with R

This workshop will provide participants with an introduction to simple and multiple linear regression. Topics covered in this workshop include the regression models, model assumptions, interpretation of coefficients, significance testing, interactions between variables and the use and interpretation of dummy variables. Model checking methods such as residual plots and collinearity diagnostics will also be covered. Several methods for model selection will be included.

Registration is free and open to all University of Waterloo faculty, staff and graduate students.

Friday, July 13, 2018 1:00 pm - 3:30 pm EDT (GMT -04:00)

Introduction to Poisson Regression with R

This workshop will provide participants with an introduction to Poisson regression used to model counts observed in a period of time. Topics covered in this workshop includes the Poisson regression model, model assumptions, interpretation of coefficients, significance testing, interactions between variables and the use and interpretation of dummy variables. Model checking methods such as residual plots and goodness-of-fit tests will also be covered. Several methods for model selection will be included.

Registration is free and open to all University of Waterloo faculty, staff and graduate students.

Friday, August 17, 2018 1:00 pm - 3:30 pm EDT (GMT -04:00)

Introduction to Logistic Regression with R

This workshop will show participants how to estimate and make inferences about a binary response probability and related quantities through logistic regression. Topics covered in this workshop includes the logistic regression model, model assumptions, interpretation of coefficients, significance testing, interactions between variables and the use and interpretation of dummy variables. Model checking methods such as residual plots and goodness-of-fit tests will also be covered. Several methods for model selection will be included.

Registration is free and open to all University of Waterloo faculty, staff and graduate students.

Wednesday, September 26, 2018 1:00 pm - 3:30 pm EDT (GMT -04:00)

Introduction to R

In this introduction to R workshop, participants will be taught the basics of this open source language. Topics covered in this workshop includes:

  • Help tools
  • Importing / exporting data
  • Data management
  • Descriptive and exploratory statistics
  • Graphics
  • Common statistical analyses

Registration is free and open to all University of Waterloo faculty, staff, graduate and undergraduate students. No programming experience is assumed

Wednesday, October 31, 2018 1:00 pm - 3:00 pm EDT (GMT -04:00)

An introduction to feature selection

Feature selection is the process of selecting a subset of relevant features (commonly known as predictors or independent variables) for model construction. Performing feature selection allows researchers to identify irrelevant data, improve the interpretation and increase predictive accuracy of learned models. A feature selection algorithm can be seen as the combination of a search technique for proposing new feature subsets, along with an evaluation which scores the different feature subsets. The choice of evaluation measure heavily influences the algorithm. There are three main categories of feature selection algorithms: wrappers, filters and embedded methods. In this seminar, we will introduce some basic feature selection methods such as score-based feature ranking, stepwise subset selection and LASSO regression.

Registration is free and open to all University of Waterloo faculty, staff, graduate and undergraduate students. The primary software we will discussed in this seminar is RStudio. There is no hands-on work in this seminar.

Wednesday, November 28, 2018 1:00 pm - 3:00 pm EST (GMT -05:00)

Analyzing ordinal data with R

Many categorical response variables have a natural order to their levels. We refer to them as ordinal variable (data). This workshop will show participants how to estimate and make inferences about ordinal data through the proportional odds model. Topics covered in this workshop includes introducing the proportional odds model, discussing the model assumptions, interpretation of coefficients, significance testing, interactions between variables and the use and interpretation of dummy variables. Model checking methods such as residual plots and goodness-of-fit tests will also be covered. Several methods for model selection will be included.

Registration is free and open to all University of Waterloo faculty, staff, graduate and undergraduate students. The primary software we will discuss in this seminar is RStudio. There is no hands-on work in this seminar.

Friday, January 18, 2019 9:30 am - 12:00 pm EST (GMT -05:00)

Introduction to ggplot2

ggplot2 is an R package has become the go-to tool for flexible and professional plots in R. Its grammar is based on the Grammar of Graphics (Wilkinson, 2005), which is composed of a set of independent components that can be composed in many ways. This hands-on workshop introduces you to the principles and the grammar of graphics plotting concepts implemented in the ggplot2 packages. We will examine the first three essential layers:  Data, Aesthetics and Geometrics for making a plot. The optional four layers will be discussed if time permits.

Friday, April 12, 2019 1:30 pm - 3:00 pm EDT (GMT -04:00)

Introduction to Data Visualization

Data visualizations are crucial to data exploration. In particular, when one is attempting to identify unanticipated patterns or relationships within complex data. In this seminar, we will cover the use and pitfalls behind boxplots and histograms. Next, quantile plots will be introduced to address the challenges of boxplots and histograms. Finally, eikosograms will be introduced as a method for visualizing categorical data. Time permitting, we will glimpse into transformations of data in order to meet model assumptions.