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[2021] Auckland - STATS 787 Data Visualisation - Final Exam - Q7 Visual Perception Concepts

[2021] Auckland - STATS 787 Data Visualisation - Final Exam - Q7 Visual Perception Concepts

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This question relates to the code below, which draws a graph of the connections between the 30 COVID cases, with the nodes arranged in order from left to right. If case i is a contact of case j, there is an edge between node i and node j. The graph is shown below the code. CourseNana.COM

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library(ggraph)
ggraph <- ggraph(graph, "linear") +
geom_edge_arc() +
geom_node_point(aes(colour=gender), size=4) +
geom_node_text(aes(label=Case), size=3, nudge_y=-.5) +
scale_colour_manual(values=c(Male=4, Female=2))

(a) [5 marks] CourseNana.COM

Explain in detail the purpose of every line of the code above, including the meaning of all functions and arguments. CourseNana.COM

(b) [5 marks] CourseNana.COM

For each of the questions below, write a paragraph explaining which visual perception concepts are involved with answering the question using the graph above. CourseNana.COM

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• What is the case number for each case? CourseNana.COM

• Which cases are female and which are male? CourseNana.COM

• Which cases are contacts of each other? CourseNana.COM

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The list of visual perception concepts to choose from are: Preattentive processing; Separable dimensions; and the "Gestalt Laws" of Proximity, Connection, Similarity, Continuity, Closure, and Figure and Ground. CourseNana.COM

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