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#### Standard Classic Functions

STD.HALFLIFE and STD.HALFLIFE.INCL
Returns the first-order decline half-life of the curve.

STD.LAMDA and STD.LAMDA.INCL
Returns the first-order decline rate constant of the curve.

STD.XMAX
Returns the independent value to the observed maximum dependent value of the curve.

STD.YMAX
Returns the observed maximum dependent value of the curve.

#### Standard Computational Method Specific Functions1

STD.AUC
Returns the area under the curve.

STD.AUCINF
Returns the area under the curve to infinity.

STD.AUMC
Returns the area under the first moment curve.

STD.AUMCINF
Returns the area under the first moment curve to infinity.

STD.IAUC
Returns the area between two independent values of the curve.

STD.IAUCINF
Returns the area between two independent values of the curve to infinity.

STD.YVAL
Returns the dependent value to an independent value of the curve.

STD.YVALINF
Returns the dependent value to an independent value of the curve to Infinity.

#### Superposition Functions1

SP.AUC
Returns the superpositioned area under the curve of the nth input interval.

SP.IAUC
Returns the superpositioned area between two independent values of the curve, of n inputs.

SP.YAVE
Returns the superpositioned average dependent value of the nth input interval.

SP.YMAX
Returns the superpositioned (observed) maximum dependent value of the nth input interval.

SP.YPRE
Returns the superpositioned pre-input dependent value of the nth input interval.

SP.YTAU
Returns the superpositioned dependent value at the end of the nth input interval.

SP.YVAL
Returns the superpositioned dependent value to an independent value of the curve, of n inputs.

#### Specific Input of Superposition Functions1

SI.IAUC
Returns the area between two independent values of the curve, to ith input of superposition.

SI.YVAL
Returns the dependent value to an independent value of the curve, to ith input of superposition.

1 Available computational methods: linear trapezoidal (LT), non-linear trapezoidal (LN), natural cubic spline (CS.N), third-degree lagrange (LG.3), fritsch-butland (FB), and yeh-small (YS).

Note: The Standard (STD) functions compute the non-compartmental parameters of a single input. The Superposition (SP) functions and Specific Input of Superposition (SI) functions extrapolate the non-compartmental parameters of multiple inputs, based on a single input.