


TRIMMEAN calculates the trimmed mean by removing the upper and lower
(p/2)% samples. Missing values (encoded as NaN) are also removed.
Q = trimmean(Y,p)
Q = trimmean(Y,p,DIM)
returns the TRIMMEAN along dimension DIM of sample array Y.
see also: MAD, RANGE, HISTO2, HISTO3, PERCENTILE, QUANTILE