Error 1004 VBA Unable to get StDev property of Worksheet Class

[HenkBroam]

Hello everyone,

Iam trying to remove outliers in a graph.
Were in collumn A is the time (1,2,3,4,5 etc)
Collumn B are the values (15,10,1,4,5,6 etc)
Iam trying to remove the outliers from the grahp but iam getting the error 1004 Unable to get StDev property of Worksheet Class.
this is my code

Sub RemoveOutliers()
    Dim ws As Worksheet
    Set ws = ThisWorkbook.Sheets("Blad1") ' Replace "Sheet1" with your sheet name
    
    Dim lastRow As Long
    lastRow = ws.Cells(ws.Rows.Count, "B").End(xlUp).Row
    
    Dim mean As Double, sd As Double
    Dim i As Long, j As Long
    
    For i = 2 To lastRow ' Assumes data starts in row 2
        mean = WorksheetFunction.Average(ws.Range("B" & i))
        sd = Application.WorksheetFunction.StDev_S(ws.Range("B" & i))
        For j = 1 To 1 ' Only one column
            If Abs(ws.Cells(i, j + 1).Value - mean) > (2 * sd) Then
                ws.Cells(i, j + 1).ClearContents
            End If
        Next j
    Next i
End Sub

 

[RoryA]

What is the point in taking the average of one cell? Or attempting the SD of one cell?

 

[HenkBroam]

What is the point in taking the average of one cell? Or attempting the SD of one cell?

I dont mean to take the average or stdev of 1 cell. But for the whole B column. I thought this was the correct code, if not what should i change?

 

[RoryA]

mean = WorksheetFunction.Average(ws.Range("B2:B" & lastrow ))

and the same for stdev. Both should be before the For loop.