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im.js
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56 lines (50 loc) · 1.32 KB
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import { factory } from '../../utils/factory.js'
import { deepMap } from '../../utils/collection.js'
const name = 'im'
const dependencies = ['typed']
export const createIm = /* #__PURE__ */ factory(name, dependencies, ({ typed }) => {
/**
* Get the imaginary part of a complex number.
* For a complex number `a + bi`, the function returns `b`.
*
* For matrices, the function is evaluated element wise.
*
* Syntax:
*
* math.im(x)
*
* Examples:
*
* const a = math.complex(2, 3)
* math.re(a) // returns number 2
* math.im(a) // returns number 3
*
* math.re(math.complex('-5.2i')) // returns number -5.2
* math.re(math.complex(2.4)) // returns number 0
*
* See also:
*
* re, conj, abs, arg
*
* @param {number | BigNumber | Complex | Array | Matrix} x
* A complex number or array with complex numbers
* @return {number | BigNumber | Array | Matrix} The imaginary part of x
*/
return typed(name, {
number: function (x) {
return 0
},
BigNumber: function (x) {
return x.mul(0)
},
Fraction: function (x) {
return x.mul(0)
},
Complex: function (x) {
return x.im
},
'Array | Matrix': function (x) {
return deepMap(x, this)
}
})
})