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I have noisy data that I filtered using the medfilt1d smoothing function. Knowing the physics of the recorded data I know it should behave sinusoidally. If I try to do a sinfit curve fit to the filtered/or non filtered data I get a no convergence error. I have ok results using the linfit function with corr() results in the 0.85 range. I'm now looking into using the LeastSquaresFit function, and have not found much informative quicksheets or ebook examples about using this function. Can anybody provide some resources?
This function is included in the "Data Analysis Extension Pack" for Mathcad (example in the attachment):
"LeastSquaresFit [vx, vy, F, guess, conf, (Stdy), (LBUB), (Acc)] - Returns parameters and their confidence limits for the nonlinear fitting function F for the data vx and vy, for a confidence level conf, with optional standard deviations Stdy and optional lower and upper bounds on acceptable parameter values. Acc is the convergence accuracy."
