isotype

The column this mark is SLICED by — long-format data, one row per name per period — showing the period the scene's parameter over that column holds, as a bar's slice does.

How much of the quantity one glyph stands for: per: 1000000 draws 2.4 million as two glyphs and two-fifths of a third. The last glyph of a value that is not a whole number of per is cut to its fraction, along the way the count runs.

How many glyphs stand across the band before the next column starts: across a bar's width on the plane — lanes: 10 with per: 1 is a waffle — or as rings on the polar plane. The value axis still reads the whole quantity, so a tick at 218 is in the column where the 218th glyph falls.

What each glyph is drawn as: one of a scatter's marker shapes, filled, or any !symbol, drawn as it is in prose. A name both offer (star, diamond, cross, tick) is the marker's.

The glyphs' colour: one colour, a list cycled reading by reading, or an expression read as a bar's, from a column or #self.value.

How solid each reading's glyphs are, 0 to 1: one opacity, a list reading by reading, or an expression giving one per reading.

Write each reading's value at its end.

Text drawn beside the element — rich text, so $maths$ and inline formatting render. Fades and draws with the element.

Declared but not drawn. Animatable — hidden: true !cue.to{false}(at: 2) reveals it — and unlike a cue, a hidden element still frames the plot and keeps its place in the count, so nothing moves when it appears.

Keeps the reader from editing this element on an editable: graph. Nothing at all on a graph that is not editable.

Text size.

Paint order among the marks: a higher layer is drawn later, on top; equal or omitted, the marks stack in document order (later on top).

The groups this isotype belongs to, comma-separated: group: Treated, Projected. It is drawn in the colour of the first group that has one, over its own colour:, and the footer's key names every group.

The readings' x values: names, numbers, or a dataset column (#pop.country). Paired with y by position, as a bar's are; exactly one of the two axes is ruled in names, and the other counts the glyphs.

The readings' y values, paired with x by position.

The share of the band at each name that the isotypes and bars there fill, 0–1, divided between them.

Stand this isotype's values on top of the bar or isotype written before it, name by name; its glyphs carry on counting from where the one beneath stopped, so a column of stacked isotypes fills as one waffle.

On the polar plane, the counts: laid end to end with every other polar isotype's, in the order written, and sharing the theta domain between them, each reading a wedge as wide as its count. θ stays an angle, so a majority of the whole is the middle ray of the window — axis.label(theta: pi/2; line) on a hemicycle.