yref

Yref is a label used in various technical contexts to denote a reference value associated with the y dimension, such as a baseline, anchor, or reference y-coordinate. It is not a universal constant or a single formal symbol, and its precise meaning depends on the domain and the software in use.

In data visualization and numerical analysis, yref is commonly the baseline against which other y-values are measured. It may be used to compute deltas, normalize data, or define stacked or comparative plots. A typical usage pattern is to compute a transformed value with formulas of the form y' = y − yref, where yref establishes the reference level.

In graphics, coordinate systems, and GIS, yref can indicate the y-coordinate of a reference point used during alignment, transformation, or calibration. It serves as an anchor for positioning, translating, or rotating other elements within a two-dimensional space.

In programming, configuration files, and scripting, yref appears as a parameter name that specifies how a system interprets y coordinates. It is often paired with xref to denote a two-dimensional reference framework, though the exact semantics vary by project.

Because there is no universal standard, the exact definition of yref should be taken from the specific documentation of the software, library, or data model in use. Users should examine parameter descriptions, units, and examples within that context to determine how yref is applied.

See also: xref, zref, reference value, baseline.