Nanda Gopan

  1. Introduction: Why ggplot2 Dominates Data Visualization The ggplot2 package, developed by Hadley Wickham, is the most influential visualization tool in R. Its power comes from the Layered Grammar of Graphics , a systematic way of thinking about data visualization. Your Global Findex visualization is an excellent illustration of how this grammar works to uncover insights about: Education Account ownership Financial exclusion Socioeconomic behavior 2. Understanding the Dataset Context The Global Findex Database , maintained by the World Bank , measures: Access to financial accounts Barriers to financial inclusion Borrowing and saving behaviours Reasons for not having an account The variables used in your sample: educ → Education level account → Has or does not have a financial account fin11d → Whether lack of money is a barrier count → Weighted number of adults This allows for layered, categorical comparisons. 3. Layered Gramma...

  1. Introduction: Why Shiny Matters Today Data is no longer useful if it stays static inside spreadsheets or reports. Modern decision-making demands interactive, real-time dashboards , and this is where Shiny , an R package developed by the RStudio team, becomes transformative Shiny allows analysts, researchers, and students to: Build web applications without writing HTML, CSS, or JavaScript Convert R code into interactive dashboards Deploy visually appealing tools for exploration, analysis, and storytelling This blog explains dashboard development using Shiny through a fully functional project: The Iris Flower Petal Dimension Explorer , based on the built-in iris dataset 2. Understanding the Architecture of a Shiny Application A Shiny app has two pillars: A. UI (User Interface) Defines what the user sees — layouts, panels, widgets, buttons, sliders, etc. B. Server Function Defines what the app does — filtering data, generating plots, computations, interacti...