ReDim Preserve “下标超出范围" [英] ReDim Preserve "Subscript Out of Range"

问题描述

我正在尝试将数据从 2 个双精度数组移动到 2 个不同的双精度数组.我不确定大小会是多少，因为我从第一个数组中取出一个随机样本并将其放入第二个数组中.

I am trying to move data from 2 Double Arrays to 2 different Double Arrays. I'm not sure what the size is going to be because I am taking a randomized sample out of the first arrays and putting it into the 2nd arrays.

当我添加 ReDim Preserve 行时，出现下标超出范围错误.

When I add the ReDim Preserve line I get the Subscript Out of Range error.

Function CreateTrainingSet(TrainingPercent As Double, Inputs() As Double, Outputs() As Double)
 ' Create Randomized Training set data
 Dim TrainingInputs() As Double, TrainingOutputs() As Double
 Dim i As Integer, j As Integer, count As Integer
 'ReDim TrainingInputs(UBound(Inputs, 1), UBound(Inputs, 2))
 'ReDim TrainingOutputs(UBound(Outputs, 1), UBound(Outputs, 2))
 count = 0

 ' Move TraningPercent % of data from Inputs and Outputs to TrainingInputs and TrainingOutputs
 For i = LBound(Inputs, 1) To UBound(Inputs, 1)
  Dim ran As Double
  ran = Rnd()
  If ran <= TrainingPercent Then
   count = count + 1
   For j = LBound(Inputs, 2) To UBound(Inputs, 2)
    ReDim Preserve TrainingInputs(1 To count, 1 To UBound(Inputs, 2))
    TrainingInputs(count, j) = Inputs(i, j)
   Next j
   For j = LBound(Outputs, 2) To UBound(Outputs, 2)
    ReDim Preserve TrainingOutputs(1 To count, 1 To UBound(Outputs, 2))
    TrainingOutputs(count, j) = Outputs(i, j)
   Next j
  End If
 Next i

 For i = LBound(TrainingInputs, 1) To UBound(TrainingInputs, 1)
  For j = LBound(TrainingInputs, 2) To UBound(TrainingInputs, 2)
   Cells(i, j + 10).Value = TrainingInputs(i, j)
  Next j
 Next i


End Function

推荐答案

把上面的评论总结成一个答案:

To summarise the comments above into an answer:

• 使用Preserve时，您只能重新调整多维数组的最后一维.

• You can only redim the last dimension of a multi dimension array when using Preserve.

因此，为了调整多维数组的大小，有几个简单的选项:

Therefore in order to resize a multiple dimension array there are a couple of simple options:

1. 如果只需要调整一个维度的大小，则翻转循环和逻辑，以便要调整大小的维度成为最后一个维度
2. 如果必须调整两个维度的大小，请使用数组数组或数组集合，并根据需要更正循环

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