Thanks for the feedback. I file those as suggestions for further review.
Here is a small example of how you could implement ArraySubset in VB.NET
Public Shared Function ArraySubSet(ByVal inputArray(,) As Double, ByVal indexArray(,) As Integer) As Array
If inputArray Is Nothing Then
Throw New ArgumentNullException("inputarray")
End If
If indexArray Is Nothing Then
Throw New ArgumentException("indexarray")
End If
Dim indexArrayRows As Integer = indexArray.GetLength(0)
Dim indexArrayColumns As Integer = indexArray.GetLength(1)
If indexArrayRows > 2 Or indexArrayColumns > 2 Then
Throw New ArgumentException("invalid argument")
End If
Dim inputArrayRows As Integer = inputArray.GetLength(0)
Dim inputArrayColumns As Integer = inputArray.GetLength(1)
Dim newArrayDimensions(1) As Integer
Dim i As Integer
For i = 0 To indexArrayRows - 1
newArrayDimensions(i) = indexArray(i, 1)
Next i
Dim rowStart As Integer = indexArray(0, 0)
Dim colStart As Integer = indexArray(1, 0)
Dim returnArray As Array = Array.CreateInstance(GetType(Double), newArrayDimensions)
'get element size. In the case of a double, this is 8 bytes.
Dim elementSize As Integer = 8
For i = 0 To (newArrayDimensions(0)) - 1
'Copy bytes from the array
Buffer.BlockCopy(inputArray, (inputArrayColumns * rowStart + colStart)
* elementSize, returnArray, i * elementSize * newArrayDimensions(1),
elementSize * newArrayDimensions(1))
rowStart = rowStart + 1
Next i
Return returnArray
End Function 'ArraySubSet
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Here is how you could use it
Dim data(5, 6) As Double
Dim l As Integer = 0
Dim i As Integer
For i = 0 To 4
Dim j As Integer
For j = 0 To 5
data(i, j) = l
l = l + 1
Next j
Next
Dim test As Array = ArrayExample.ArraySubSet(data, New Integer(,) {{1, 2}, {0, 3}})
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I think I got it right, but this should get you up and running.
The Array class already has a Copy method.
We have the Measurements.SpectrumUnitConversion() method, which provides the same functionality as the one in CWDSP.
I hope this helps.
Bilal Durrani
NI
