This is a MATLAB version of Jerome Friedman's 1984 supersmoother algorithm. The original was written in Fortran; this is a vectorized translation. The algorithm is a variable span smoother which uses cross validation to pick the best span for each predicted point.
Douglas Schwarz (2021). Supersmoother (https://www.mathworks.com/matlabcentral/fileexchange/17986-supersmoother), MATLAB Central File Exchange. Retrieved .
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