add native range charts
まだ誰も着手していません。
- 主要言語
- JavaScript
- スター
- 18.3k
- フォーク
- 2k
- 平均マージ
- 2日 12時間
- マージ済み PR(30日)
- 28
説明
MinutePhysics called us out (by name!) for not having native support for range charts: https://www.youtube.com/watch?v=5zBg9pH_6bE
However, to be clear, it is possible to build this chart type in Plotly using the base attribute for bar charts and doing a bit of data preparation.
Here's a live demo of a custom range chart and our built-ins: https://codepen.io/ndrezn/pen/XJrWboB
Code snippet
/**
* Creates a range bar chart using Plotly.js.
*
* @param {Object} data - The dataset, with keys as categories (e.g., cities) and values as arrays of measurements.
* @param {Array} labels - The labels for each measurement (e.g., temperature metrics).
* @param {string} containerId - The ID of the HTML container to render the chart.
* @param {string} title - The title of the chart.
*/
function rangeChart(data, labels, containerId, title) {
const categories = Object.keys(data); // Extract categories (e.g., cities)
// Generate bar traces for each label
const barTraces = labels.map((label, index) => {
const bases = categories.map((category) =>
index === 0 ? data[category][index] : data[category][index - 1]
); // base, i.e. the previous value
const heights = categories.map(
(category) => data[category][index] - bases[categories.indexOf(category)]
); // Height relative to the base, i.e. the current value
return {
x: categories,
y: heights, // Bar heights
base: bases, // Starting points for each bar
name: label,
type: "bar"
};
});
// Layout for the chart
const layout = {
title: title,
barmode: "overlay", // Overlapping bars to show ranges
xaxis: { title: "Category" },
yaxis: { title: "Value" }
};
// Render the chart
Plotly.newPlot(containerId, barTraces, layout);
}
const ranges = {
Ontario: [-9, 3, 8, 13, 27],
England: [3, 8, 12, 16, 24],
Kentucky: [-3, 8, 14, 20, 30]
};
const labels = [
"Winter mean low",
"Annual mean low",
"Annual mean",
"Annual mean high",
"Summer mean high"
];
rangeChart(
ranges,
labels,
"rangePlot",
"Temperature Ranges in Three Londons (range)"
);
That being said, having this chart-type built in would be great. The mental gymnastics are a bit tricky to get a true range chart working correctly.
Here are the built-in ways to achieve a similar chart:
Code snippet
// Data for the three Londons
const ranges = {
Ontario: [-9, 3, 8, 13, 27],
England: [3, 8, 12, 16, 24],
Kentucky: [-3, 8, 14, 20, 30]
};
const labels = [
"Winter mean low",
"Annual mean low",
"Annual mean",
"Annual mean high",
"Summer mean high"
];
const cities = Object.keys(ranges);
// Scatter plot traces
const scatterTraces = labels.map((label, index) => ({
x: cities,
y: cities.map((city) => ranges[city][index]),
mode: "markers",
name: label,
type: "scatter"
}));
const scatterLayout = {
title: "Temperature Ranges in Three Londons (scatter)",
xaxis: { title: "City" },
yaxis: { title: "Temperature" }
};
Plotly.newPlot("scatterPlot", scatterTraces, scatterLayout);
// Bar plot traces
const barTraces = labels.map((label, index) => ({
x: cities,
y: cities.map((city) => ranges[city][index]),
name: label,
type: "bar"
}));
const barLayout = {
title: "Temperature Ranges in Three Londons (overlay)",
barmode: "overlay",
xaxis: { title: "City" },
yaxis: { title: "Temperature" }
};
Plotly.newPlot("barPlot", barTraces, barLayout);
// Bar plot traces
const stackedBarTraces = labels.map((label, index) => ({
x: cities,
y: cities.map((city) => ranges[city][index]),
name: label,
type: "bar"
}));
const stackedBarLayout = {
title: "Temperature Ranges in Three Londons (stacked)",
barmode: "stack",
xaxis: { title: "City" },
yaxis: { title: "Temperature" }
};
Plotly.newPlot("stackedBarPlot", stackedBarTraces, stackedBarLayout);
However, these aren't quite right.
- The scatter plot is most legible, but doesn't depict a range
- The overlaid bar shows the right data, but because the
baseof all positive points is0, they actually overlap on top of each other. We want the base to he previous, and for England, we want the base to be3, not0. - The stacked bar chart looks right at first glance, but it's actually summing all the temperatures (and of course, the
basefor England is at0, not3. And the negative values stack a bit weirdly.
コントリビューションガイド
はじめの一歩
- issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
- 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
- リポジトリをフォークし、ブランチを切って変更します。
- issue 番号を参照したプルリクエストを送ります。
調査の方向性
ソースファイル、テスト、エントリーポイントは特定されていません。まず issue のカスタム range-chart 例から始め、その動作を、一覧にある scatter、overlaid-bar、stacked-bar のアプローチと比較してください。Plotly.js が range-chart をネイティブにサポートし、ゼロ以外のベースと負のベースを正しく処理できれば完了です。
索引モデルが issue の本文から書いたものです。
評価
- 技術スタック
- javascript
- 領域
- data-visualization
- issue の種類
- 機能追加
- 難易度
- 5/5
- 見積もり時間
- 1週間以上
- 活発さ
- 停滞
- 明瞭さ
- おおむね明確
- 初心者へのやさしさ
- 35/100