Learning D3.JS 5.0 7.1: Circles in Action

This video tutorial covers the creation of scatter plots using D3.js. It begins with an introduction to scatter plots and their applications in data visualization. The tutorial then explains the setup of HTML and necessary scripts, followed by styling and data variable configuration. It provides detailed steps for creating SVG elements and building a scatter plot, including customizing attributes like radius and color. The video concludes with a preview of the scatter plot and a teaser for the next tutorial on adding labels.

What is the primary purpose of a scatter plot?

• To list data in a sequential order

• To show relationships between two variables

• To display data in a tabular format

• To represent data in a pie chart

Which file is essential for creating a scatter plot using D3.js?

• index.html

• style.css

• d3.js

• data.json

What change was made to the margin in the CSS styling?

• Increased from 10 pixels to 20 pixels

• Decreased from 20 pixels to 10 pixels

• No change was made

• Changed from 15 pixels to 25 pixels

What is the purpose of the 'data' variable in the JavaScript code?

• To manage user inputs

• To hold the data points for the scatter plot

• To store HTML elements

• To define CSS styles

Which method is used to append SVG elements in the JavaScript code?

• createElement

• appendChild

• append

• insert

What attribute is set to define the size of the circles in the scatter plot?

• width

• radius

• color

• height

Which method is used to select all circle elements in the SVG?

• getElementById

• querySelector

• selectAll

• select