# XWUIChartCumulativeFrequency

A cumulative-frequency chart: a fixed-type (`type: 'cumulativeFrequency'`) wrapper
around `XWUIChart` that plots a running total across categories, producing the
rising ogive curve used in statistics. Pass each `series` of `{ x, y }` values plus
a `block` preset (1-4) and `size` (`sm` / `md` / `lg`); legend, grid,
axis, and data-label toggles come from the shared block config. Use it to read off
how many observations fall at or below each point.

## Basic Usage

Two monthly series accumulated into rising cumulative-frequency curves at the medium
size preset.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: Two {x, y} series drawn as rising cumulative-frequency ogives via the cumulativeFrequency chart type.
```

## Final Exam Score Ogive

Two class sections' cumulative percentage of students at or below each score band, with a median guide line.

```example
file: examples/ExamScoreOgive.ts
html: examples/ExamScoreOgive.html
title: Final Exam Score Ogive
description: Cumulative percent of each section scoring at or below each 10-point band, climbing to 100% at large size.
```

## Cumulative Rainfall Water Year

Running rainfall totals for two cities from October to June, comparing how each accumulates toward its annual normal.

```example
file: examples/CumulativeRainfall.ts
html: examples/CumulativeRainfall.html
title: Cumulative Rainfall Water Year
description: Monotonic running rainfall totals in mm for Seattle and Portland with a wet-quarter region band.
```

```api
```