Introduction

This presentation introduces the “Simple Shiny Calculator,” a Shiny application built in R. The app allows users to input a number and calculate its square, demonstrating basic interactivity using Shiny.

• Objective: Showcase a simple Shiny app.
• Target Audience: R users and learners interested in Shiny.

App Overview

The Simple Shiny Calculator has the following features:

• Input: A numeric input field for entering a number.
• Action: A “Calculate Square” button to trigger the computation.
• Output: Displays the result in the format “The square of [input] is [result]”.

The app is built with two files: ui.R for the user interface and server.R for the server logic.

Try the App

You can interact with the Simple Shiny Calculator at the following link:

Simple Shiny Calculator

• Click the link to open the app in your browser.
• Enter a number (e.g., 5) and click “Calculate Square” to see the result.

How It Works

The app leverages Shiny’s reactive framework:

• UI (ui.R): Defines a fluidPage layout with a numericInput, an actionButton, and a textOutput.
• Server (server.R): Uses observeEvent to detect button clicks, calculates the square of the input, and renders the result with renderText.
• Deployment: Hosted on Shinyapps.io for public access.

This structure ensures the app is modular and easy to maintain.

Conclusion

The Simple Shiny Calculator demonstrates how Shiny can create interactive web applications in R with minimal code. It’s a starting point for more complex apps, such as adding multiple calculations or visualizations.

• Next Steps: Explore additional Shiny features like plots or more inputs.
• Access the App: Visit the link on Slide 3 to try it out!