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49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
// basic usage
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// create an instance of math.js
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var math = require('../index')();
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/**
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* Helper function to output a value in the console. Value will be formatted.
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* @param {*} value
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*/
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function print (value) {
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var precision = 5;
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console.log(math.format(value, precision));
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}
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// functions and constants
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console.log('functions and constants');
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print(math.round(math.e, 3)); // 2.718
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print(math.atan2(3, -3) / math.pi); // 0.75
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print(math.log(10000, 10)); // 4
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print(math.sqrt(-4)); // 2i
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print(math.pow([[-1, 2], [3, 1]], 2)); // [[7, 0], [0, 7]]
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console.log();
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// expressions
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console.log('expressions');
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print(math.eval('1.2 * (2 + 4.5)')); // 7.8
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print(math.eval('5.08 cm in inch')); // 2 inch
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print(math.eval('sin(45 deg) ^ 2')); // 0.5
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print(math.eval('9 / 3 + 2i')); // 3 + 2i
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print(math.eval('det([-1, 2; 3, 1])')); // -7
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console.log();
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// chained operations
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console.log('chained operations');
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var a = math.select(3)
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.add(4)
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.multiply(2)
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.done();
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print(a); // 14
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console.log();
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// mixed use of different data types in functions
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console.log('mixed use of data types');
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print(math.add(4, [5, 6])); // Number + array, [9, 10]
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print(math.multiply(math.unit('5 mm'), 3)); // Unit * Number, 15 mm
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print(math.subtract([2, 3, 4], 5)); // Array - Number, [-3, -2, -1]
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print(math.add(math.matrix([2, 3]), [4, 5])); // Matrix + Array, [6, 8]
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console.log();
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