Spaghetti plot
Definition
A line plot that displays multiple individual trajectories or time series on the same axes. Each subject or dataset is represented by a separate line, often resulting in a “tangle” of overlapping paths resembling spaghetti. It’s commonly used in longitudinal studies to show variability across individuals.
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Writing Alternative Text
Describe the variables, then summarize the changes in the overlapping lines, noting any common patterns, clusters, or differences in the individual trajectories.
Example Alt Text
"A spaghetti plot shows many individual forced vital capacity percentage measurements against age from 0 to 90 years. Yellow lines represent people without loss of ambulation, and purple lines represent people with loss of ambulation. The graph highlights differences in lung‑function between the two groups and how it changes with age."