Apply Formula to Cell Using a VBA defined Array

Question

There are definitely easier ways to achieve what this code is trying to do, but I created a simplified code to show what I am trying to achieve. Basically I want to perform calculations on lots of data and I don't want to have to have to add that to the worksheets.

So basically I need to run formulas like sum, averageifs, etc. in a worksheet through using an Array that I defined in my Macro. At this point I can't figure out how to turn this array, containing 5 values, into a "=sum( )" function. Thanks in advance for your help!

Sub ArraySum()

Dim numbers(5) As Double
Dim E As Double

For I = 1 To 5
    E = Cells(I, 1)
    numbers(I) = Cos(E)
Next I

Range("b1").Formula = "=sum(" & numbers & ")"

End Sub

Answer 1

It's not clear why you'd want to do it this way, but:

Sub ArraySum()

    Dim numbers(1 To 5) '<<<
    Dim E As Double

    For I = 1 To 5
        E = Cells(I, 1)
        numbers(I) = Cos(E)
    Next I

    Range("B1").Formula = "=SUM(" & Join(numbers, ",") & ")"

End Sub

but then you might as well just do:

Range("B1").FormulaArray = "=SUM(COS(A1:A5))"

Answer 2

Another way if you don't need the formula to actually be in that cell:

Range("b1").Value = Application.WorksheetFunction.Sum(numbers)

Edit: If you haven't set Option Base 1 then Dim numbers(3) As Double will create a 4-element array numbers(0),...,numbers(3) since the default is Base 0 . I would recommend using Dim numbers(1 to 3) As Double rather than relying on the Base option.

Edit 2: You either have forgotten Dim I in your example or don't use Option Explicit which is highly reccomended!

Answer 3

Does it have to be an equation in the worksheet? You could just get the total and put it there:

Sub ArraySum()

    Dim numbers(1 To 5) '<<<
    Dim E As Double

    For I = 1 To 5
        E = Cells(I, 1)
        numbers(I) = Cos(E)
    Next I

    Range("B1").Value = Application.WorksheetFunction.Sum(numbers)
End Sub