Series data structures.

Each series type is a struct tagged by its :type field, consumed by the renderer. Series are plain data; they do not carry any rendering state.

Types

• Bland.Series.Line — connected polyline
• Bland.Series.Scatter — discrete points with markers
• Bland.Series.Bar — categorical bars with hatched fills
• Bland.Series.Histogram — binned observations (numeric x-axis)
• Bland.Series.Heatmap — 2D grid of hatched cells
• Bland.Series.Contour — iso-level curves on a 2D grid
• Bland.Series.Area — filled region between a curve and a baseline
• Bland.Series.Polygon — closed filled polygon
• Bland.Series.ErrorBar — points with X/Y uncertainty whiskers
• Bland.Series.BoxPlot — box-and-whisker summary per category
• Bland.Series.Stem — vertical stems with markers (DSP)
• Bland.Series.Quiver — 2D arrow vector field
• Bland.Series.Hline — horizontal reference line
• Bland.Series.Vline — vertical reference line
• Bland.Series.Hspan — horizontal shaded band (y-bounds)
• Bland.Series.Vspan — vertical shaded band (x-bounds)
• Bland.Series.FillBetween — hatched region between two curves

Prefer the builder helpers in Bland rather than instantiating these directly.

Twin y axis

Line, Scatter, Area, Stem, ErrorBar and Hline carry an :axis field — :left (default) or :right — selecting which y scale they are measured against. See Bland.Figure.

Uncertainty

Line, Scatter, Bar, Histogram and Stem all carry the same error fields, so switching plot type never changes how error is reported:

• :yerr, :xerr — an error spec; see Bland.Uncertainty
• :error_style — :band or :bars. nil takes the per-type default: a band for line and step, I-bars for the rest
• :error_hatch — band fill override
• :cap_width — I-bar cap width in px