The code does not appear to use the assignment to the indicated variable. This situation occurs when any of the following are true:

• The specified argument value contains a typographical error, causing it to appear unused.

• The code does not use all values returned by a function call.

• The function requires a specific number of output arguments to execute the wanted behavior.

If the message displays because of a typographical error, fix the error.

If the code must ignore some output argument values, use the tilde operator (~) to replace the unused argument. This tilde operator eliminates unused argument names from your program, and clarifies your intent to ignore the returned values. MATLAB introduced the tilde operator in R2009b; therefore, use it only when running version R2009b or later.

If the message is unwarranted, suppress it, as described in Adjust Code Analyzer Message Indicators and Messages. Consider including a comment in your code explaining the reason for this suppression. For more information, see “Ignoring Selected Outputs or Input Arguments”.