mathjs/examples/basic_usage.js at develop · walney/mathjs · GitHub

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// basic usage

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

const math = require('..')

// functions and constants

console.log('functions and constants')

print(math.round(math.e, 3)) // 2.718

print(math.atan2(3, -3) / math.pi) // 0.75

print(math.log(10000, 10)) // 4

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

print(math.pow([[-1, 2], [3, 1]], 2)) // [[7, 0], [0, 7]]

print(math.derivative('x^2 + x', 'x')) // 2 * x + 1

console.log()

// expressions

console.log('expressions')

print(math.evaluate('1.2 * (2 + 4.5)')) // 7.8

print(math.evaluate('12.7 cm to inch')) // 5 inch

print(math.evaluate('sin(45 deg) ^ 2')) // 0.5

print(math.evaluate('9 / 3 + 2i')) // 3 + 2i

print(math.evaluate('det([-1, 2; 3, 1])')) // -7

console.log()

// chained operations

console.log('chained operations')

const a = math.chain(3)

.add(4)

.multiply(2)

.done()

print(a) // 14

console.log()

// mixed use of different data types in functions

console.log('mixed use of data types')

print(math.add(4, [5, 6])) // number + Array, [9, 10]

print(math.multiply(math.unit('5 mm'), 3)) // Unit * number, 15 mm

print(math.subtract([2, 3, 4], 5)) // Array - number, [-3, -2, -1]

print(math.add(math.matrix([2, 3]), [4, 5])) // Matrix + Array, [6, 8]

console.log()

/**

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

* @param {*} value

function print (value) {

const precision = 14

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

}

mathjs/examples/basic_usage.js at develop · walney/mathjs · GitHub

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