Sorting Vba Bubble Insertion Quick
Transcript of Sorting Vba Bubble Insertion Quick
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8/12/2019 Sorting Vba Bubble Insertion Quick
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3 Sorting Algorithms in Excel VBA: Bubble Sort, Insertion Sort, Quick Sort
1 Nyasha Madavo, VBA Developer.net 3 ways to sort in VBA
Introduction
Sorting algorithms have important applications inValue at Riskcalculations and other risk and pricing functions in finance. Forexample, when calculatingVaRviaMonte Carlo simulation,we run asimulation of the asset prices many times, and save the change inportfolio value for each simulation. We then need to sort the manythousands of values in order to pick theValue at Riskat the requiredconfidence interval.
Bubble Sort Algorithm and VBA Code
The bubble sort is a simple sorting algorithm that compares adjacentpairs of values within an array, adjusting the order of the values toplace the smaller value before the larger one. It does this repeatedlyfor a cycle through the entire array. The algorithm counts whether ornot any changes have been made during a cycle. The algorithm stopswhen no changes have been made.
The bubble sort is a relatively slow and non-scalable algorithm that isnot recommended for use in larger data sets.
Function Bubblesort(Array_Values As Object)Application.Calculation = xlCalculationManualApplication.Volatile (False)
Application.ScreenUpdating = False
Dim size As Long, changed As LongDim tmp As Double, nums() As DoubleDim limit As Long, i As Long, cycle As Longlimit = Array_Values.Rows.Count
ReDim Preserve nums(1 To limit)
For i = 1 To limitnums(i) = Array_Values(i)
Next i
timer_val = Timer
Docycle = cycle + 1changed = 0
For i = 1 To limit - 1
If nums(i) > nums(i + 1) Thentmp = nums(i)nums(i) = nums(i + 1)nums(i + 1) = tmpchanged = 1End If
Next i
Loop Until changed = 0Bubblesort = WorksheetFunction.Transpose(nums)
Application.Volatile (True)
Application.Calculation = xlCalculationAutomaticApplication.ScreenUpdating = True
End Function
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3 Sorting Algorithms in Excel VBA: Bubble Sort, Insertion Sort, Quick Sort
3 Nyasha Madavo, VBA Developer.net 3 ways to sort in VBA
Dim i As Long, j As Long
Dim less_or_equal() As DoubleDim greater() As DoubleDim Array_Values() As DoubleDim New_Array_Values()Dim pivot As DoubleDim array1, array2
limit = UBound(Param_Array)
ReDim Preserve Array_Values(1 To limit)
For i = 1 To limit
Array_Values(i) = Param_Array(i)Next i
Select Case limit
Case Is 2pivot = WorksheetFunction.RoundUp(limit / 2, 0)pivot = WorksheetFunction.Median(Array_Values(pivot),
Array_Values(1), Array_Values(limit))
End Select
Dim limit As Long, lim_less_or_equal As Long, lim_greater As Long
lim_less_or_equal = 0lim_greater = 0
For i = 1 To limitIf Array_Values(i)
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3 Sorting Algorithms in Excel VBA: Bubble Sort, Insertion Sort, Quick Sort
4 Nyasha Madavo, VBA Developer.net 3 ways to sort in VBA
ReDim Preserve array1(1 To limit1)ReDim Preserve array2(1 To limit2)
For i = 1 To limit1array1(i) = Param_Array1(i)
Next i
For i = 1 To limit2array2(i) = Param_Array2(i)Next i
ReDim Preserve new_array(1 To limit1 + limit2)
For i = 1 To limit1new_array(i) = array1(i)
Next i
j = 0For i = (limit1 + 1) To (limit1 + limit2)
j = j + 1new_array(i) = array2(j)
Next i
Concatenate_VBA = new_array
End Function
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6 Nyasha Madavo, VBA Developer.net 3 ways to sort in VBA
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