Why do I receive errors when I use the FIR1 function without any input arguments in Signal Processing Toolbox 6.8 (R2007b)?

It is mentioned in the documentation that the FIR1 function can be called without any input arguments. However, I receive the following error message when I implement the same:

 ??? Error using ==> fir1 at 62

 Not enough input arguments.

Answer 1

[MathWorks Support Team]

This is an error within the documentation for Signal Processing Toolbox 6.8 (R2007b) within the Syntax section of FIR1 function. The FIR1 function cannot be used without any input arguments.