Frequency values instead of scale - how to modify scalogram cwt and dwt

Hello , I need to know how to display frequency instead of scale on scalograms like this:

I prepared this basing on example : http://www.mathworks.com/help/wavelet/ref/cwt.html

and fragment of my code is attached in my post. I will be really happy if anybody give me adivce ( asap :) Thanks a lot Aga