graphing

NZPolls Graphing

Political polling data and R code to generate charts for New Zealand election polling data.

Prerequisites

Data CSV generation is written in JavaScript for use by Node. The graphing script is written in the R programming language.

• Node.js
• R programming language
• RStudio, a development environment

Update the polling data source

1. Copy the table from Wikipedia into the Scraper tool and generate the corresponding YAML.
2. Copy this code into the data.yml file under its respective election section.

Generate polling data

1. Open your CLI and cd into [...]/nzpolls/graphing.
2. Run npm install to install the necessary dependencies.
3. Run node . 2026 (or any other election year) to generate the CSV data file.

Generate chart

1. Open RStudio
2. Open Tools and click "Install Packages"
3. Install the ggplot2 package
4. Open graphing.r in RStudio and adjust the working directory to [...]/nzpolls/graphing.
5. Select all the code in the file and press the "Run" button.
6. Export the generated charts as SVG by opening the "Export" option in the plotting window and selecting "Save as image".