Learning R for Data Visualization (Video 17)

This video tutorial covers the use of fixed and dynamic labels in GGplot2, focusing on adding text labels to plots for clarity. It explains how to use the GM_text function to add labels, both fixed and dynamic, and how to customize axis labels for categorical and continuous variables. The tutorial emphasizes the importance of labels in providing context and clarity to plots, and concludes with a summary of customization options available in GGplot2.

Why is it important to add text labels to plots in GG Plot 2?

• To make the plot more complex

• To increase the size of the plot

• To make the plot look more colorful

• To provide context and additional information

Which function is used to add fixed text labels in GG Plot 2?

• GM_bar

• GM_point

• GM_line

• GM_text

What must be specified when adding a fixed text label using GM_text?

• The type of plot

• The color of the plot

• The aesthetics including position and angle

• The size of the plot

What is the purpose of dynamic text labels in a plot?

• To make the plot larger

• To adjust label positions based on data values

• To provide static information

• To change the color of the plot

Which function helps in creating dynamic labels with variable data?

• combine

• attach

• paste

• merge

How can you change the labels of categorical variables on the X-axis?

• Using scale_X_discrete

• Using scale_X_continuous

• Using scale_Y_continuous

• Using scale_Y_discrete

What options must be provided to change labels of continuous variables?

• Position and angle

• Breaks and labels

• Color and size

• Width and height