22 Oct
2009
22 Oct
'09
2:26 a.m.
Based on a definition here: http://en.wikipedia.org/wiki/Spectral_flux
I guess you want to take the difference between the power spectral densities (PSD) of successive blocks. Your fexpr~ statement won't do that. You need to delay one copy of the PSD signal by a whole block and subtract it from the current PSD--it's easy to do with delread~/delwrite~.
Then, write the contents to a table with tabwrite~ , and use expr to sum up the values in the table. See the expr documentation here: http://crca.ucsd.edu/~syadegar/expr.html
Chuck