yhigh

Yhigh is a term used in data visualization and statistical analysis to denote an upper bound or high threshold associated with a variable labeled Y. In plotting contexts, yhigh can specify the maximum y-value displayed on an axis or the upper limit of a shaded confidence or error band. The concept is usually paired with a corresponding lower bound, often referenced as ylow, to define a range.

Origin and usage: The idea of upper and lower bounds for a variable is standard in charting and data presentation. The exact naming of the bound as yhigh varies by library and workflow, with some configurations using alternatives such as Y-high or y_high. In practice, yhigh serves as a configurable parameter that helps control scale, avoid overcrowding, or emphasize variability in the data.

Software and implementation: In visualization pipelines, yhigh is typically computed from the data or set by the user. Common methods include taking the maximum observed value, applying a percentile-based cap (for example, the 95th or 99th percentile), or using a domain limit specified in a chart specification. yhigh may then be used to fix the y-axis range, define display thresholds, or bound derived metrics.

Applications: yhigh appears in dashboards for weather, finance, and scientific measurements where clear emphasis on the upper end of a distribution is needed. It helps ensure consistent scaling across related plots and supports the visual interpretation of outliers or extreme values.

See also: ylow, ymin, y-axis, axis range, data visualization.