如何重塑 flutter (dart) 列表

Question

我正在使用 tflite 库，它需要一个形状为 [1, 150, 3] 的数组，我有 3 个 arrays [150]，当我尝试列出 3 个列表时，它的形状变为 [3, 150] 并且当using.reshape() 它破坏了我只需要反转列表维度的整个顺序。

代码片段：

[rs, gs, bs].reshape([150, 3]

简单解释 发生了什么：

before reshape: [1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15]

after reshape: [1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12], [13, 14, 15]

我需要的：

before reshape: [1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15]

after reshape: [1, 6, 11], [2, 7, 12], [3, 8, 13], [4, 9, 14], [5, 10, 15]

Answer 1

使用转置方法来自： https://pub.dev/packages/matrix2d

List before = [
    [1, 2, 3, 4, 5],
    [6, 7, 8, 9, 10],
    [11, 12, 13, 14, 15]
  ];

  print(before.transpose); //[1, 6, 11], [2, 7, 12], [3, 8, 13], [4, 9, 14], [5, 10, 15]