The DERIVSIG function computes the standard deviation of a derivative as found by the DERIV function, using the input variables of DERIV and the standard deviations of those input variables.
Result = DERIVSIG( [X, Y, Sigx,] Sigy )
Returns the standard deviation of a derivative as found by the DERIV function.
Differentiate with respect to this variable. If omitted, unit spacing for Y (i.e., Xi = i) is assumed.
The variable to be differentiated. Omit if X is omitted.
The standard deviation of X (either vector or constant). Use "0.0" if the abscissa is exact; omit if X is omitted.
The standard deviation of Y. Sigy must be a vector if the other arguments are omitted, but may be either a vector or a constant if X, Y, and Sigx are supplied.
None.
Introduced: Pre 4.0