Signal, spectrogram and long-term spectrum

Dear all,

after an unfruitful research, I wanted to ask if someone knows a function able to automate the plot of a signal, its spectrogram and long term spectrum in a nice way like I show in the scheme below:

http://www.freeimagehosting.net/lrfhk

I'm asking because I'm pretty sure I saw something similar somewhere...

Regards,

Giuliano