compute-rad2deg

rad2deg

Converts radians to degrees.

Installation

$ npm install compute-rad2deg

For use in the browser, use browserify.

Usage

To use the module,

var rad2deg = require( 'compute-rad2deg' );

rad2deg( x )

Converts radians to degrees. x may be either a numeric array or a single numeric value.

// Single value:
var deg = rad2deg( Math.PI/2 );
// returns 90

// Array of values:
var rads = [ 0, Math.PI/4, Math.PI/2, 3*Math.PI/4, Math.PI ];

rad2deg( rads );
// returns [ 0, 45, 90, 135, 180 ]

Examples

var rad2deg = require( 'compute-rad2deg' );

// Simulate some data...
var data = new Array( 100 );

var twopi = 2*Math.PI;
for ( var i = 0; i < data.length; i++ ) {
	data[ i ] = Math.random()*twopi;
}

rad2deg( data );

console.log( data.join( '\n' ) );

To run the example code from the top-level application directory,

$ node ./examples/index.js

Notes

• If provided an input array, the array is mutated. If mutation is undesired,

var data = [ 0, 45, 90, 135, 180 ],
	copy = data.slice();

rad2deg( copy );

• If provided an empty array, the function returns null.

• Beware of floating point errors.

var deg = rad2deg( Math.PI / 6 );
// returns 29.999999999999996 instead of 30

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

MIT license.

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Copyright

Copyright © 2014. Athan Reines.