如何重塑 flutter (dart) 列表

Question

我正在使用 tflite 庫，它需要一個形狀為 [1, 150, 3] 的數組，我有 3 個 arrays [150]，當我嘗試列出 3 個列表時，它的形狀變為 [3, 150] 並且當using.reshape() 它破壞了我只需要反轉列表維度的整個順序。

代碼片段：

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

簡單解釋 發生了什么：

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

使用轉置方法來自： 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]