I want to find the frequency of ssvep excitation signal. Software is working with MATLAB .This frequency, as a feature, is to be used to determine epilepsy. We all know that medical engineering is moving toward diagnosing diseases with the device. These diagnoses are obtained by extracting the characteristics of different signals. After the feature extracting, we can use the proper classification and identify the diseases. Now if you can help me get this feature out of the following signals. You can download the signals in the attachment .The signals are .mat files.The stimuli are sinusoidally single-frequency. Frequency of stimuli is 9.25 to 14.75