mathjs is an extensive and powerful JavaScript library for mathematics. It offers a wide range of mathematical and statistical functions, from basic to advanced, making it an invaluable tool for any developer. In this introduction, we’ll explore a variety of mathjs APIs with code snippets to illustrate their usage.
1. Basic Arithmetic
const math = require('mathjs');
const sum = math.add(6, 4); // 10
const difference = math.subtract(10, 4); // 6
const product = math.multiply(4, 5); // 20
const quotient = math.divide(20, 4); // 5
2. Complex Numbers
const complex1 = math.complex(2, 3);
const complex2 = math.complex(4, -1);
const complexSum = math.add(complex1, complex2); // Complex { _data: [ 6, 2 ] }
const complexProduct = math.multiply(complex1, complex2); // Complex { _data: [ 11, 10 ] }
3. Matrix Operations
const matrix1 = math.matrix([[1, 2], [3, 4]]);
const matrix2 = math.matrix([[5, 6], [7, 8]]);
const matrixSum = math.add(matrix1, matrix2); // Matrix { _data: [ [6, 8], [10, 12] ]}
const matrixProduct = math.multiply(matrix1, matrix2); // Matrix { _data: [ [19, 22], [43, 50] ]}
4. Trigonometry
const sinValue = math.sin(math.pi / 2); // 1
const cosValue = math.cos(0); // 1
const tanValue = math.tan(math.pi / 4); // 1
5. Statistics
const mean = math.mean([2, 6, 4, 8]); // 5
const median = math.median([2, 6, 4, 8]); // 5
const std = math.std([2, 6, 4, 8]); // 2.581988897471611
6. Algebra
const equation = '2x + 3 = 7';
const solutions = math.algebra.solve(equation); // [2]
7. Units
const distance = math.unit(5, 'km');
const convertedDistance = distance.to('m'); // 5000 m
8. Parsing and Evaluating Expressions
const expression = 'sin(0.5) ^ 2 + cos(0.5) ^ 2';
const result = math.evaluate(expression); // 1
App Example
const math = require('mathjs');
const data = [2, 4, 6, 8, 10];
const mean = math.mean(data);
const variance = math.variance(data);
const std = math.std(data);
console.log(`Mean: ${mean}`);
console.log(`Variance: ${variance}`);
console.log(`Standard Deviation: ${std}`);
With this introduction and the above examples, you are now ready to start using mathjs for your own projects. It is a versatile library that can handle a wide range of mathematical operations, making your development work easier and more efficient.
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