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Understanding Position Dodge in ggplot2: Why it Changes the Total Value

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Adding Legends to ggplots Without Aesthetics: A Comprehensive Guide

Customizing Tooltip with ggplotly in Shiny Applications

Visualizing Grouped Data with ggplot2: Mastering Level Order and Best Practices

To answer your question based on the provided code snippet, it seems like you're trying to create a line graph where the x-axis represents different variables and the y-axis represents values. The `gather` function is used to pivot the data from wide format to long format, which is necessary for creating a line graph.