# XWUIChartErrorBar

An error-bar chart: a fixed-type (`errorBar`) wrapper around `XWUIChart` that plots each data point
with a vertical whisker marking its uncertainty interval. Pass `series` of
`{ name, data: [{ x, y }] }` plus an optional `block` preset (1-4) and `size`
(`sm` / `md` / `lg`); the shared block config also exposes legend, grid, axis, data-label,
and tooltip-formatter toggles. Use it to show individual measurements alongside their confidence
range or standard deviation.

## Basic Usage

Two named series of monthly values plotted as points with error whiskers at the md size preset.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: Two monthly series rendered as points with vertical error bars.
```

## Lab Measurement ± StdDev by Sample

Six assay samples plotted as measured points with standard-deviation whiskers, set against a flat
control baseline for reference.

```example
file: examples/LabMeasurement.ts
html: examples/LabMeasurement.html
title: Lab Measurement ± StdDev by Sample
description: Per-sample assay points with error whiskers above a constant control line, in mg.
```

## Sensor Readings by Hour

Hourly sensor readings shown as points with error bars, compared against a flat calibration
baseline across the day.

```example
file: examples/SensorReadings.ts
html: examples/SensorReadings.html
title: Sensor Readings by Hour
description: Hourly temperature readings with whiskers against a 22 °C baseline series.
```

```api
```