如何在flutter中的[-1，1]之间对数据进行规范化 [英] How to normalise data between [-1, 1] in flutter

问题描述

我想知道在flutter中是否有内置的归一化功能。像这样

I was wondering if there is a built in normalisation function in flutter. That works like this

List<int> array = [-105,24,66,-50,-49,2]

//Normalises to get numbers between -1 and 1
List<double> normalised = array.normalise(-1,1) 

推荐答案

恐怕没有人，但是我已经手动完成了您要寻找的东西：

I'm afraid there isn't one, but I've made what you're looking for manually:

import 'dart:math';

List<int> array = [-105, 24, 66, -50, -49, 2];
final lower = array.reduce(min);
final upper = array.reduce(max);
final List<double> normalized = [];

array.forEach((element) => element < 0
    ? normalized.add(-(element / lower))
    : normalized.add(element / upper));

print(normalized);

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