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CppAD
AD
ADValued
unary_standard_math
log1p
Headings->
Syntax
Description
x, y
CPPAD_USE_CPLUSPLUS_2011
CPPAD_USE_CPLUSPLUS_2011.true
CPPAD_USE_CPLUSPLUS_2011.false
Example
@(@\newcommand{\W}[1]{ \; #1 \; } \newcommand{\R}[1]{ {\rm #1} } \newcommand{\B}[1]{ {\bf #1} } \newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} } \newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} } \newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} } \newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }@)@
The Logarithm of One Plus Argument: log1p
Syntax
y
= log1p(
x
)
Description
Returns the value of the logarithm of one plus argument which is defined by
y
== log(1 +
x
)
.
x, y
See the
possible types
for a unary standard math function.
CPPAD_USE_CPLUSPLUS_2011
true
If this preprocessor symbol is true (
1
), and
x
is an AD type, this is an
atomic operation
.
false
If this preprocessor symbol is false (
0
), CppAD uses the representation
@[@ \R{log1p} (x) = \log(1 + x) @]@
to compute this function.
Example
The file
log1p.cpp
contains an example and test of this function.
Input File: include/cppad/core/log1p.hpp