DERIVSIG

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.

Calling Sequence

Result = DERIVSIG( [X, Y, Sigx,] Sigy )

Arguments

X

The variable to differentiate with respect to. If omitted, unit spacing for Y (i.e., X i = i ) is assumed.

Y

The variable to be differentiated. Omit if X is omitted.

Sigx

The standard deviation of X (either vector or constant). Use "0.0" if the abscissa is exact; omit if X is omitted.

Sigy

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.

See Also

DERIV