XL2000: The Trend Function Works Differently in Functions Than in Macros (213690)

SYMPTOMS

When you use the Microsoft Excel Trend function in a Sub procedure in a Microsoft Visual Basic for Applications macro, the function behaves differently than when you use it in a custom function.

You can use the Trend function in a custom function similar to the way you do in a spreadsheet. For example, the following function works correctly when called by a formula in a worksheet:

Function NewTrend(KnownYs, NewXs)

   NewTrend = Application.Trend(KnownYs, , NewXs, True)

End Function

However, if this function is called by a subroutine in a module, the following error message may appear:

Unable to get the Trend property of the WorksheetFunction class

When you use similar code in the Sub procedure, the error message may also appear. For example, the error message may appear when you run the following code in a Sub procedure:

Sub TrendError()
   MsgBox Application.Trend(Worksheets(1).Range("A1:D1").Value, , 5, True)
End Sub

WORKAROUND

Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs. If you have limited programming experience, you may want to contact a Microsoft Certified Partner or the Microsoft fee-based consulting line at (800) 936-5200. For more information about Microsoft Certified Partners, please visit the following Microsoft Web site:

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For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

How to Use the Trend Function in a Sub Procedure

The method in this article for using a Trend function in a Sub procedure requires that the argument for new x's be passed as a Single or a Double data type. Note that the Trend function also returns an array and that it is necessary to pull the desired element to view the result of the function.

The following sample macro uses a Trend function in a Sub procedure:

Sub GoodTrend()
   Dim NewXs as Single
   NewXs = 5
   Result = Application.WorksheetFunction.Trend( _
      Worksheets(1).Range("A1:D1").Value, , NewXs, True)
   MsgBox Result(1)
End Sub

NOTE: This macro works with horizontal or vertical ranges.

XL2000: The Trend Function Works Differently in Functions Than in Macros (213690)

SYMPTOMS

WORKAROUND

How to Use the Trend Function in a Sub Procedure

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