numeric scalar. If 0, selects unbiased algorithm; and
if 1, selects the biased version.
Value
Return value depends on argument x. If vector, returns the
standard deviation. If matrix, returns vector containing the standard
deviation of each column.
Details
If flag = 0 the result is the square root of an unbiased estimator of
the variance. std(X,1) returns the standard deviation producing the
second moment of the set of values about their mean.