JavaScript 数据实用程序库：Datalib

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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

);