Multiple Choices: ggplot2(Modify Plot)

1. Which function is used to modify text elements such as axis labels and titles in ggplot2?

theme_text() text_modify() element_text() text_theme()

2. Which argument in element_text() controls the text color?

size face angle color

3. What does face = 'bold' do in element_text()?

Makes text bold Changes text color Rotates text Underlines text

4. Which function is used to remove the legend from a ggplot?”

theme(legend.position = 'none') theme(legend.remove = TRUE) theme(legend = FALSE) remove_legend()

5. Which theme function applies a minimalistic design with no grid lines?

theme_minimal() theme_classic() theme_light() theme_void()

6. What does theme(panel.background = element_rect(fill = 'gray')) do?

Changes the text color to gray Changes the panel background color to gray Removes the panel background Adds a grid to the panel

7. Which argument in element_text() adjusts text rotation?

angle hjust vjust color

8. What does theme(plot.title = element_text(hjust = 0.5)) do?

Changes the plot title to bold Removes the plot title Aligns the title to the left Centers the plot title

9. Which function is used to change the font size of axis titles?

theme(axis.title = element_text(size = 14)) theme(axis.text = element_text(size = 14)) theme(title.size = 14) theme(axis.fontsize = 14)

10. What is the default position of the legend in ggplot?

left right top bottom

11. Which function is used to add annotations to a ggplot?

text_annotate() add_text() annotate() theme_annotate()

12. Which of the following correctly adds a text annotation at (x = 10, y = 20)?

annotate('label', x = 10, y = 20, label = 'Point A') theme_annotate('text', x = 10, y = 20, label = 'Point A') geom_text('text', x = 10, y = 20, label = 'Point A') annotate('text', x = 10, y = 20, label = 'Point A')

13. What does annotate('rect', xmin = 2, xmax = 4, ymin = 3, ymax = 6, fill = 'blue', alpha = 0.3) do?

Adds a text annotation Adds a red rectangle to the plot Adds a semi-transparent blue rectangle to the plot Changes the background color

14. Which argument in annotate() controls text size?

size fontsize textsize labelsize

15. Which argument in annotate('segment') specifies an arrow?

add_arrow = TRUE type = 'arrow' arrow = arrow() arrow_type = 1

16. What does annotate('point', x = 5, y = 10, color = 'red', size = 3) do?

Adds a text annotation Changes the point color of all data points Removes a data point Adds a red point at (5, 10)

17. Which function is preferred for adding multiple text labels tied to data?

geom_text() annotate('text') theme_text() element_text()

18. What does annotate('text', x = 50, y = 100, label = 'Important Point', color = 'red', fontface = 'bold') do?

Adds a title to the plot Adds a bold red text annotation at (50, 100) Removes the legend Changes the axis label color

19. Which function is used to highlight a region in ggplot?

annotate('rect') annotate('text') theme(rectangle) geom_rect()

20. What does annotate('segment', x = 2, xend = 5, y = 3, yend = 8, arrow = arrow()) do?

Adds a vertical line Adds a horizontal line Draws a dashed line Draws an arrow from (2,3) to (5,8)