Exp Sub1

Exponentiates a number and subtracts 1.

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Interface
Exp Sub1
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Interface

C++

Excel

Exp Sub1

doubleexp_sub1( double x )

Calculates the exponential of a number and subtracts 1:

$e^x -1$

(2)

Use when x <= 0.15

References:

DiDinato, A. R. and Morris, A. H. Algorithm 708: Significant Digit Computation of the Incomplete Beta Function Ratios. ACM Trans. Math. Softw. 18 (1993), 360-373.

Note

This is the inverse of Maths/Arithmetic/ln_add1

Parameters

x	argument to evaluate the function at

Returns

$(e^x) -1$

(3)

Authors

Barry W. Brown, James Lovato, Kathy Russell
Documentation by Nick Owens, Vince Cole
Updated by Will Bateman (August 2005)

Source Code

Source code is available when you agree to a GP Licence or buy a Commercial Licence.

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