函数 pickRandom #

从一维数组中随机选取一个或多个值。数组元素的选取使用具有均匀或加权分布的随机函数。

Syntax #

math.pickRandom(array)
math.pickRandom(array, number)
math.pickRandom(array, weights)
math.pickRandom(array, number, weights)
math.pickRandom(array, weights, number)
math.pickRandom(array, { weights, number, elementWise })

Parameters #

Parameter Type Description
array Array | Matrix 一维数组
number 整数 一个整数或浮点数
权重 Array | Matrix 整数或浮点数数组

Returns #

Type Description
数字 | 数组 当 number 未定义时,返回数组中的单个随机值。当 number 已定义时,返回具有配置数量元素的数组。

Throws #

Type | Description —- | ———–

Examples #

math.pickRandom([3, 6, 12, 2])                  // returns one of the values in the array
math.pickRandom([3, 6, 12, 2], 2)               // returns an array of two of the values in the array
math.pickRandom([3, 6, 12, 2], { number: 2 })   // returns an array of two of the values in the array
math.pickRandom([3, 6, 12, 2], [1, 3, 2, 1])    // returns one of the values in the array with weighted distribution
math.pickRandom([3, 6, 12, 2], 2, [1, 3, 2, 1]) // returns an array of two of the values in the array with weighted distribution
math.pickRandom([3, 6, 12, 2], [1, 3, 2, 1], 2) // returns an array of two of the values in the array with weighted distribution

math.pickRandom([{x: 1.0, y: 2.0}, {x: 1.1, y: 2.0}], { elementWise: false })
    // returns one of the items in the array

另请参阅 #

random, randomInt

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