sigma method
Returns the standard deviation of the numbers in array
in the region
ixstart, ixend
(ixend exclusive): sigma = Sqrt(variance(arr))
ixstart
and ixend
may be null, equivalent to the left/rightmost index.
Implementation
static double sigma(Float64List array, int ixstart, int ixend) {
if (ixstart == null) ixstart = 0;
if (ixend == null) ixend = array.length - 1;
return math.sqrt(variance(array, ixstart, ixend));
}