FNStdreturns the standard deviation of the elements in the arrayA. Thestandard deviationis the square root of the average value of the squares of the differences between the elements in the array and the mean value of the elements. This version of the standard deviation uses the number of points in the arrayA,n, as the divisor in the averaging calculation, instead of the valuen- 1 used in some formulas for standard deviation.
TheF_variancesubroutine returns the square of the standard deviation.
Errors
FNStdcauses an HTBasic error if its arguments are not of the types listed in the USAGE section, above.