DataVizTP3_StackedArea
This stacked area chart visualizes monthly stock prices for multiple companies (MSFT, AMZN, IBM, AAPL) from 2000 to 2010, using a dataset loaded from a CSV file. The chart shows how each company’s price contributes to the total across time, with colored layers and a legend identifying each symbol. Built with D3 v4, it uses `d3.stack()`, `d3.area()`, and `d3.nest()` to structure the data, while `d3.scaleTime()`, `d3.scaleLinear()`, and `d3.scaleOrdinal()` handle scaling and colors. SVG paths render the areas, and axes are added with `d3.axisBottom()` and `d3.axisLeft()`.