# XWUIChartUnitArray

A unit-array (isotype) chart: a fixed-type wrapper around `XWUIChart` (`type: 'unitArray'`)
that represents each `series` value as a count of discrete unit marks in a grid rather than
a continuous bar, so quantities read as countable icons. Pass a `block` preset (1-4) and
`size` (`sm` / `md` / `lg`). Use it for pictographic counts, completion or
proportion summaries where "how many units" should be immediately visible.

## Basic Usage

Two named series of monthly values rendered as grids of discrete unit marks at the medium size
preset.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: Two {x, y} series rendered as countable grids of unit marks.
```

## Team Headcount by Department

Year-over-year department sizes drawn as grids of countable unit marks so growth reads as a tally of people.

```example
file: examples/TeamHeadcount.ts
html: examples/TeamHeadcount.html
title: Team Headcount by Department
description: Department headcounts over four years as countable people marks with a legend and labels.
```

## Sprint Story Points

Story points planned versus delivered across six sprints, rendered as discrete marks so the gap is countable.

```example
file: examples/SprintStoryPoints.ts
html: examples/SprintStoryPoints.html
title: Sprint Story Points
description: Planned versus delivered story points per sprint as unit marks with point-unit tooltips.
```

```api
```