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# Error Using Returned Values as Input with Fourier Analysis

Article ID: 114182

Article Last Modified on 8/15/2003

APPLIES TO

- Microsoft Excel 5.0c

This article was previously published under Q114182

## SYMPTOMS

In Microsoft Excel, when you use the Fourier Analysis tool, provided in the Analysis ToolPak add-in, to transform data in a worksheet, and you then use the Fourier Analysis tool again and you use values previously returned by this function as the new input range values, you receive the following error message:
Fourier Analysis - All complex numbers must have the same suffix, either "i" or "j".
This behavior does not occur in Microsoft Excel version 4.0.

## CAUSE

This behavior occurs because any non-imaginary number that is returned by the Fourier Analysis tool is formatted as a text value instead of number value. Because the Input Range value used in the Fourier Analysis tool must be formatted as a number, the error message appears when you use this returned value as an input value in the Fourier Analysis tool.

## WORKAROUND

To avoid receiving this error message, do either of the following before using the Fourier Analysis tool using an input data range that has been returned by the Fourier Analysis tool:

- Use the Paste Special dialog box to convert the values to numbers instead of text by doing the following:
  1. In a blank cell, type `1`.
  2. Select the cell containing the 1, and choose Copy from the Edit menu.
  3. Select the range that contains the values that have been returned by the Fourier Analysis tool.
  4. From the Edit menu, choose Paste Special.
  5. In the Paste Special dialog box, under Paste, select Values, and under Operation, choose Multiply. Choose OK.
  -or-
- Use the following macro to enter each of the numbers in the selection as a number value instead of a text value:

            Sub Enter_Value()
            Dim xCell As Object
               For Each xCell In Selection
                   xCell.Value = xCell.Value
               Next xCell
            End Sub

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## REFERENCES

For more information about Fourier Analysis, choose the Search button in Help and type:

`Fourier Analysis Tool`

Additional query words: 5.00c err msg addin addins toolpack tool pak pack XL5

Keywords: KB114182