> As stated earlier and with this code, it looks like dB must be a function. > In MATLAB, try > > which dB > > to see if there's such a file on your matlabpath. Then you can either get > help for it or edit it to see what it does. > > --Loren > > http://blogs.mathworks.com/loren >
dB is a matlab function. In signal processing toolbox
EDU>> help db db Convert to decibels. db(X) converts the elements of X to decibel units across a 1 Ohm load. The elements of X are assumed to represent voltage measurements.
EDU>> which db C:\Program Files (x86)\MATLAB\R2013a Student\toolbox\signal\signal\db.m