Problems with cwt function

Hello, I'm using function cwt function and at line 766 there is a function named "plotscalogramfreq" that involves the variable "wgetfrequnitstrs", but it is never defined in the function. How is it working? My purpose is to obtain a graphic without using logaritmic scale on YAxes, but if I change the matlab function "cwt" I get an error. Thanks, Nicola Raffo