IMLOG10

Returns the common logarithm (base 10) of a complex number in x + yi or x + yj text format.

If this function is not available, and returns the #NAME? error, install and load the Analysis ToolPak add-in.

On the Tools menu, click Add-Ins.
In the Add-Ins available list, select the Analysis ToolPak box, and then click OK.
If necessary, follow the instructions in the setup program.

Syntax

IMLOG10(inumber)

Inumber is a complex number for which you want the common logarithm.

Remarks

Use COMPLEX to convert real and imaginary coefficients into a complex number.
The common logarithm of a complex number can be calculated from the natural logarithm as follows:

Example

The example may be easier to understand if you copy it to a blank worksheet.

Create a blank workbook or worksheet.
Select the example in the Help topic. Do not select the row or column headers.

Selecting an example from Help
Press CTRL+C.
In the worksheet, select cell A1, and press CTRL+V.
To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

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A	B
Formula	Description (Result)
=IMLOG10("3+4i")	Logarithm (base 10) of 3+4i (0.69897 + 0.402719i)