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47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
// complex numbers
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// load math.js and create an instance
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var mathjs = require('../index'),
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math = mathjs();
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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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// create a complex number with a numeric real and complex part
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console.log('create and manipulate complex numbers');
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var a = math.complex(2, 3);
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print(a); // 2 + 3i
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// read the real and complex parts of the complex number
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print(a.re); // 2
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print(a.im); // 3
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// clone a complex value
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var clone = a.clone();
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print(clone); // 2 + 3i
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// adjust the complex value
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a.re = 5;
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print(a); // 5 + 3i
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// create a complex number by providing a string with real and complex parts
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var b = math.complex('3 - 7i');
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print(b); // 3 - 7i
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console.log();
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// perform operations with complex numbers
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console.log('perform operations');
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print(math.add(a, b)); // 8 - 4i
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print(math.multiply(a, b)); // 36 - 26i
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print(math.sin(a)); // -9.6541 + 2.8417i
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// some operations will return a complex number depending on the arguments
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print(math.sqrt(4)); // 2
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print(math.sqrt(-4)); // 2i
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