## Table of Contents

Understanding CSS Positioning: Solving the Issue of Images Increasing Height on Every Reload

Troubleshooting Quartz Graphics Context Issues with Letters and Numbers on MacOSX 10.7.2 Lion

Understanding PostgreSQL Execution with PHP: Overcoming `exec()` Status Code Issues When Running PostgreSQL Scripts

Understanding Shiny Apps: Selecting Unique Values from a Common Column

Creating Dataframes with Embedded Plots in R Using ggplot2 and Purrr

Time Filtering in R: Techniques for Cleaning and Validating Time-Based Data

Failing to Overwrite File on File Repository with redcapAPI in R

Extracting Primary Classifier from String Data with Repeated Delimiters Using Pandas

Matching Variables Between Datasets Using dplyr Package in R for Data Analysis and Machine Learning