Thanks for the response! I have tried using fft, but as the frequency and amplitude are varying in time, the information gets a bit "cluttered" in frequency domain. I guess what I'm asking for is an algorithm to recognize a signal that is smooth, looks like sinuses of varying...
I am working with a pattern recognition problem, using 1-dimensional movement data, and some small movement patterns i'm looking at are characterized by looking like small sinuses (nice rounded curves), they appear sometimes here and there, with different duration (sometimes 1/2 period...
