Publications by Ruohai Wang
Assignment #5
Chapter 6 - The Haunted DAG & The Causal Terror Multiple regression is no oracle, but only a golem. It is logical, but the relationships it describes are conditional associations, not causal influences. Therefore additional information, from outside the model, is needed to make sense of it. This chapter presented introductory examples of some com...
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Assignment #6
Chapter 7 - Ulysses’ Compass The chapter began with the problem of overfitting, a universal phenomenon by which models with more parameters fit a sample better, even when the additional parameters are meaningless. Two common tools were introduced to address overfitting: regularizing priors and estimates of out-of-sample accuracy (WAIC and PSIS)...
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Assignment #12
Chapter 14 - Adventures in Covariance This chapter extended the basic multilevel strategy of partial pooling to slopes as well as intercepts. Accomplishing this meant modeling covariation in the statistical population of parameters. The LKJcorr prior was introduced as a convenient family of priors for correlation matrices. You saw how covariance ...
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Problem Set1 - ggplot basics - Ruohai Wang
Directions During ANLY 512 we will be studying the theory and practice of data visualization. We will be using R and the packages within R to assemble data and construct many different types of visualizations. We begin by studying some of the theoretical aspects of visualization. To do that we must appreciate the basic steps in the process of mak...
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ANLY 512 Lab1 Ruohai Wang 09/12/2021
ANLY 512 Lab 1 - Dashboard Theory Ruohai Wang — 09/12/2021 Objective Row Requirement: Delineate the necessary decision (I will do that below). Identify what information will be relevant to decision making. Find and collect the data necessary to create your visualization plan. Organize and summarize the collected data. Design and creat...
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ANLY 512 Lab2 Ruohai Wang 10/06/2021
ANLY 512 Lab 2 - Data Exploration and Analysis Ruohai Wang Introduction Row Objective The objective of this laboratory is to survey the available data, plan, design, and create an information dashboard/presentation that not only explores the data but helps you develop questions based on that data exploration. To accomplish this task you...
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ANLY 512 Course Project Ruohai Wang
ANLY 512 Course Project Ruohai Wang Introduction Row Objective Objective Develop a visualization dashboard based on a series of data about your own life. The actual data used for this project can range from daily sleep regimes, TV shows watched, types of food eaten, spending habits, commute times to work, travel habits, to blood pressur...
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