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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by misi2096[/i] [br]Hello! I want to analyze the time-frequency domain of evoked potential oscillations from EEG data with continuous wavelet transform. More specifically I would like to plot it like time (basically timepoints) on X-axis and frequency (pseudo-frequency) in Hz on Y-axis. Can you tell me how to [b]convert Morlet wavelet scales to frequencies[/b]? According to MATLAB documentation I would have to know the central frequency (sometimes referred to as center freq.) of the Morlet wavelet to be able to compute the pseudo-frequencies table. MATLAB states, that the formula is: ps.F = centr.F / ( scale * sampl.period) and for MATLAB's built in Morlet wavelet it states central frequency as 0.8125. Here you can see the mismatch: [img]http://www10.pic-upload.de/16.12.12/7z7v6xgdgim9.png[/img] [img]http://www10.pic-upload.de/16.12.12/9rrtqzur9h6.png[/img] I've read the English documentation but I still don't understand what the "[b]Wave number[/b]" parameter stands for when using Morlet wavelets. Does it have something to do with the desired central frequency? Thank you in advance! [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.