Function index #

Create an index. An Index can store ranges having start, step, and end for multiple dimensions. Matrix.get, Matrix.set, and math.subset accept an Index as input.

Syntax #

math.index(range1, range2, ...)

Where #

Parameters #

Parameter Type Description
ranges …* Zero or more ranges or numbers.

Returns #

Type Description
Index Returns the created index

Examples #

const math = require('mathjs')

const b = [1, 2, 3, 4, 5]
math.subset(b, math.index([1, 2, 3]))     // returns [2, 3, 4]

const a = math.matrix([[1, 2], [3, 4]])
a.subset(math.index(0, 1))             // returns 2

See also #

bignumber, boolean, complex, matrix, number, string, unit

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