mathjs/examples/complex_numbers.js at feature/comments · JavaScriptIOT/mathjs · GitHub

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// complex numbers

// load math.js (using node.js)

var math = require('../index');

// create a complex number with a numeric real and complex part

console.log('create and manipulate complex numbers');

var a = math.complex(2, 3);

print(a); // 2 + 3i

// read the real and complex parts of the complex number

print(a.re); // 2

print(a.im); // 3

// clone a complex value

var clone = a.clone();

print(clone); // 2 + 3i

// adjust the complex value

a.re = 5;

print(a); // 5 + 3i

// create a complex number by providing a string with real and complex parts

var b = math.complex('3-7i');

print(b); // 3 - 7i

console.log();

// perform operations with complex numbers

console.log('perform operations');

print(math.add(a, b)); // 8 - 4i

print(math.multiply(a, b)); // 36 - 26i

print(math.sin(a)); // -9.6541254768548 + 2.8416922956064i

// some operations will return a complex number depending on the arguments

print(math.sqrt(4)); // 2

print(math.sqrt(-4)); // 2i

// create a complex number from polar coordinates

console.log('create complex numbers with polar coordinates');

var c = math.complex({r: math.sqrt(2), phi: math.pi / 4});

print(c); // 1 + i

// get polar coordinates of a complex number

var d = math.complex(3, 4);

console.log(d.abs(), d.arg()); // radius = 5, phi = 0.9272952180016122

/**

* Helper function to output a value in the console. Value will be formatted.

* @param {*} value

function print (value) {

var precision = 14;

console.log(math.format(value, precision));

}

mathjs/examples/complex_numbers.js at feature/comments · JavaScriptIOT/mathjs · GitHub

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