JavaScript 数据实用程序库：Datalib

Datalib 是一个 JavaScript 数据实用程序库。

 

它提供用于数据加载、 类型推理、 常见统计和字符串的模板。包括：

• 加载并解析数据文件(JSON, TopoJSON, CSV, TSV).

• 统计摘要(均值、偏差、中位数、相关测量等).

• 数据驱动字符串模版，包括一组筛选器.

• 用于处理 JavaScript 对象和数组的实用程序.

代码示例：

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// Load datalib. var dl = require('datalib');    // Load and parse a CSV file. Datalib does type inference for you. // The result is an array of JavaScript objects with named values. // Parsed dates are stored as UNIX timestamp values. var data = dl.csv('http://uwdata.github.io/datalib/data/stocks.csv');    // Show summary statistics for each column of the data table. console.log(dl.summary(data).toString());    // Compute correlation measures between price and date. var price = dl.accessor('price'); var date = dl.accessor('date'); console.log(   dl.cor(data, price, date),      // Pearson product-moment correlation   dl.cor.rank(data, price, date), // Spearman rank correlation   dl.cor.dist(data, price, date)  // Distance correlation );