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Because Microsoft Excel stores complex numbers as text, complex numbers cannot be formatted like real numbers. This article provides sample code for a user-defined function that applies number formats to complex numbers.
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers 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 requirements. Complex numbers are real and imaginary coefficients which combine to form a complex number. They are in the form of x+yi or x+yj where x is the real coefficient and y is the imaginary coefficient. Complex numbers always carry a suffix of the letter i or j.
The function in this article takes three arguments: the number to be formatted, a format code for the real component, and a format code for the imaginary component. For example, the function
would display the complex number in cell A1 with two decimal places for the real component and four decimal places for the imaginary component.
You can also use multisection formats to format positive, negative, and zero components differently. For example, the function
would have the same result as the earlier example, but with zero components displaying as "0" rather than including extra zeroes to the right of the decimal point. If you use a multisection format, the formats for negative numbers must begin with a "-" (minus sign) as in the example.
Sample Visual Basic Procedure
For additional information about getting help with Visual Basic for Applications, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/226118/US-EN/ )OFF2000: Programming Resources for Visual Basic for Applications
Article ID: 151338 - Last Review: November 1, 2013 - Revision: 3.0