Speed of Light
Dataset from Michelson's speed of light measurements in 1879.
Installation
$ npm install datasets-michelson-speed-of-light
For use in the browser, use browserify.
Usage
var data = ;
data
Dataset from Albert Michelson's speed of light measurements made from June 5 to July 2, 1879. The dataset comprises 5
experiments, each having 20
runs, thus yielding 100
measurements. Measurement values are in units of millions of meters per second.
console;/*[[299.85, 299.74, 299.9, ...],[299.96, 299.94, 299.96, ...],[299.88, 299.88, 299.88, ...],[299.89, 299.81, 299.81, ...],[299.89, 299.84, 299.78, ...]]*/
Examples
var toMatrix =mean =variance =data = ;var matmus2;// Convert the data into a matrix:mat = ;/*[ 299.85 299.74 299.9 .... . .. . .. . .299.89 299.84 299.78 ... ]*/// Calculate the sample mean across the rows (experiments):mu = ;/*[ mu_1mu_2mu_3mu_4mu_5 ]*/// Calculate the sample variance across the rows:s2 = ;/*[ s2_1s2_2s2_3s2_4s2_5 ]*/// Calculate the mean across all experiments:console;// returns 299.8524 => true value is 299,792,458 m/s
To run the example code from the top-level application directory,
$ node ./examples/index.js
References
- Michelson, Albert A. (1882). "Experimental determination of the velocity of light made at the United States Naval Academy, Annapolis." Astronomic Papers 1 135–8. U.S. Nautical Almanac Office. (See Table 24.)
- Dorsey, Ernest N. (1944). "The Velocity of Light." Transactions of the American Philosophical Society, Volume 34, Part 1, Pages 1-110, Table 22.
Tests
Unit
Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:
$ make test
All new feature development should have corresponding unit tests to validate correct functionality.
Test Coverage
This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:
$ make test-cov
Istanbul creates a ./reports/coverage
directory. To access an HTML version of the report,
$ make view-cov
License
Copyright
Copyright © 2015. The Compute.io Authors.