Data Visualization with ggplot2 MCQ question and answer with solution

11.
What is the purpose of the labs() function in ggplot2?

A. Customizes the labels and captions of the plot

B. Adds a legend to the plot

C. Sets the size of the plot margins

D. Applies statistical transformations to the data

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12.
How do you create a histogram in ggplot2 for a numeric variable named variable?

A. geom_histogram(x = variable)

B. histogram(variable)

C. geom_hist(mapping = aes(x = variable))

D. hist_plot(variable)

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13.
In ggplot2, how do you add a smooth line to a scatter plot?

A. geom_smooth()

B. smooth_line()

C. geom_line_smooth()

D. line_smooth()

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14.
How do you customize the color of data points based on a categorical variable color_var in a ggplot2 scatter plot?

A. scale_color_manual(values = color_var)

B. scale_color_identity()

C. color = color_var

D. aes(color = color_var)

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15.
In ggplot2, how do you customize the x-axis labels for a categorical variable category?

A. scale_x_continuous(labels = category)

B. theme(axis.text.x = element_text(labels = category))

C. labs(x = category)

D. scale_x_discrete(labels = category)

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16.
In ggplot2, how do you add a color gradient to a scatter plot based on a numeric variable color_var?

A. scale_fill_gradient(low = "blue", high = "red")

B. color_gradient(low = "blue", high = "red")

C. scale_color_gradient(low = "blue", high = "red")

D. geom_point(aes(color = color_var), fill = "blue")

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17.
What is the purpose of the geom_bar(stat = "identity") syntax in ggplot2?

A. Plots the counts directly without statistical transformation

B. Adds statistical transformation to the bar plot

C. Identifies the identity of each bar in the plot

D. Maps the identity of each data point to the y-axis

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18.
How do you create a violin plot in ggplot2 for a numerical variable named values grouped by a factor variable group?

A. geom_violin(x = group, y = values)

B. geom_violin(mapping = aes(x = group, y = values))

C. violin_plot(group, values)

D. geom_violin(aes(x = group, y = values))

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19.
In ggplot2, what is the role of the coord_polar() function?

A. Converts a scatter plot to a polar coordinate system

B. Adds polar coordinates to the plot

C. Modifies the polar coordinates of a specific layer

D. Coordinates the position of labels in a polar plot

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20.
How do you create a stacked bar plot in ggplot2 for two categorical variables category1 and category2?

A. geom_bar(aes(x = category1, fill = category2), position = "stack")

B. stacked_bar(category1, category2)

C. geom_bar(mapping = aes(x = category1, fill = category2), stat = "stack")

D. bar_plot_stack(category1, category2)

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Data Visualization with ggplot2 MCQ question and answer with solution | R Programming MCQs

11. What is the purpose of the labs() function in ggplot2?

Answer & Solution

12. How do you create a histogram in ggplot2 for a numeric variable named variable?

Answer & Solution

13. In ggplot2, how do you add a smooth line to a scatter plot?

Answer & Solution

14. How do you customize the color of data points based on a categorical variable color_var in a ggplot2 scatter plot?

Answer & Solution

15. In ggplot2, how do you customize the x-axis labels for a categorical variable category?

Answer & Solution

16. In ggplot2, how do you add a color gradient to a scatter plot based on a numeric variable color_var?

Answer & Solution

17. What is the purpose of the geom_bar(stat = "identity") syntax in ggplot2?

Answer & Solution

18. How do you create a violin plot in ggplot2 for a numerical variable named values grouped by a factor variable group?

Answer & Solution

19. In ggplot2, what is the role of the coord_polar() function?

Answer & Solution

20. How do you create a stacked bar plot in ggplot2 for two categorical variables category1 and category2?

Answer & Solution

Read More Section(Data Visualization with ggplot2)

11.
What is the purpose of the labs() function in ggplot2?

12.
How do you create a histogram in ggplot2 for a numeric variable named variable?

13.
In ggplot2, how do you add a smooth line to a scatter plot?

14.
How do you customize the color of data points based on a categorical variable color_var in a ggplot2 scatter plot?

15.
In ggplot2, how do you customize the x-axis labels for a categorical variable category?

16.
In ggplot2, how do you add a color gradient to a scatter plot based on a numeric variable color_var?

17.
What is the purpose of the geom_bar(stat = "identity") syntax in ggplot2?

18.
How do you create a violin plot in ggplot2 for a numerical variable named values grouped by a factor variable group?

19.
In ggplot2, what is the role of the coord_polar() function?

20.
How do you create a stacked bar plot in ggplot2 for two categorical variables category1 and category2?