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Kirill Smelkov
cpython
Commits
61f4d5f6
Commit
61f4d5f6
authored
Jul 17, 1997
by
Guido van Rossum
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New cmath module docs, by AMK (with additions and deletions by Guido).
parent
8cbaa515
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Doc/lib/libcmath.tex
Doc/lib/libcmath.tex
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Doc/libcmath.tex
Doc/libcmath.tex
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Doc/lib/libcmath.tex
0 → 100644
View file @
61f4d5f6
\section
{
Built-in Module
\sectcode
{
cmath
}}
\label
{
module-cmath
}
\bimodindex
{
cmath
}
\renewcommand
{
\indexsubitem
}{
(in module cmath)
}
This module is always available.
It provides access to mathematical functions for complex numbers.
The functions are:
\iftexi
\begin{funcdesc}
{
acos
}{
x
}
\funcline
{
asin
}{
x
}
\funcline
{
atan
}{
x
}
\funcline
{
cos
}{
x
}
\funcline
{
cosh
}{
x
}
\funcline
{
exp
}{
x
}
\funcline
{
log
}{
x
}
\funcline
{
log10
}{
x
}
\funcline
{
sin
}{
x
}
\funcline
{
sinh
}{
x
}
\funcline
{
sqrt
}{
x
}
\funcline
{
tan
}{
x
}
\funcline
{
tanh
}{
x
}
\end{funcdesc}
\else
\code
{
acos(
\varvars
{
x
}
)
}
,
\code
{
acosh(
\varvars
{
x
}
)
}
,
\code
{
asin(
\varvars
{
x
}
)
}
,
\code
{
asinh(
\varvars
{
x
}
)
}
,
\code
{
atan(
\varvars
{
x
}
)
}
,
\code
{
atanh(
\varvars
{
x
}
)
}
,
\code
{
cos(
\varvars
{
x
}
)
}
,
\code
{
cosh(
\varvars
{
x
}
)
}
,
\code
{
exp(
\varvars
{
x
}
)
}
,
\code
{
log(
\varvars
{
x
}
)
}
,
\code
{
log10(
\varvars
{
x
}
)
}
,
\code
{
sin(
\varvars
{
x
}
)
}
,
\code
{
sinh(
\varvars
{
x
}
)
}
,
\code
{
sqrt(
\varvars
{
x
}
)
}
,
\code
{
tan(
\varvars
{
x
}
)
}
,
\code
{
tanh(
\varvars
{
x
}
)
}
.
\fi
The module also defines two mathematical constants:
\iftexi
\begin{datadesc}
{
pi
}
\dataline
{
e
}
\end{datadesc}
\else
\code
{
pi
}
and
\code
{
e
}
.
\fi
Note that the selection of functions is similar, but not identical, to
that in module
\code
{
math
}
. The reason for having two modules is,
that some users aren't interested in complex numbers, and perhaps
don't even know what they are. They would rather have
\code
{
math(-1)
}
raise an exception than return a complex number. Also note that the
functions defined in
\code
{
cmath
}
always return a complex number, even
if the answer can be expressed as a real number (in which case the
complex number has an imaginary part of zero).
Doc/libcmath.tex
0 → 100644
View file @
61f4d5f6
\section
{
Built-in Module
\sectcode
{
cmath
}}
\label
{
module-cmath
}
\bimodindex
{
cmath
}
\renewcommand
{
\indexsubitem
}{
(in module cmath)
}
This module is always available.
It provides access to mathematical functions for complex numbers.
The functions are:
\iftexi
\begin{funcdesc}
{
acos
}{
x
}
\funcline
{
asin
}{
x
}
\funcline
{
atan
}{
x
}
\funcline
{
cos
}{
x
}
\funcline
{
cosh
}{
x
}
\funcline
{
exp
}{
x
}
\funcline
{
log
}{
x
}
\funcline
{
log10
}{
x
}
\funcline
{
sin
}{
x
}
\funcline
{
sinh
}{
x
}
\funcline
{
sqrt
}{
x
}
\funcline
{
tan
}{
x
}
\funcline
{
tanh
}{
x
}
\end{funcdesc}
\else
\code
{
acos(
\varvars
{
x
}
)
}
,
\code
{
acosh(
\varvars
{
x
}
)
}
,
\code
{
asin(
\varvars
{
x
}
)
}
,
\code
{
asinh(
\varvars
{
x
}
)
}
,
\code
{
atan(
\varvars
{
x
}
)
}
,
\code
{
atanh(
\varvars
{
x
}
)
}
,
\code
{
cos(
\varvars
{
x
}
)
}
,
\code
{
cosh(
\varvars
{
x
}
)
}
,
\code
{
exp(
\varvars
{
x
}
)
}
,
\code
{
log(
\varvars
{
x
}
)
}
,
\code
{
log10(
\varvars
{
x
}
)
}
,
\code
{
sin(
\varvars
{
x
}
)
}
,
\code
{
sinh(
\varvars
{
x
}
)
}
,
\code
{
sqrt(
\varvars
{
x
}
)
}
,
\code
{
tan(
\varvars
{
x
}
)
}
,
\code
{
tanh(
\varvars
{
x
}
)
}
.
\fi
The module also defines two mathematical constants:
\iftexi
\begin{datadesc}
{
pi
}
\dataline
{
e
}
\end{datadesc}
\else
\code
{
pi
}
and
\code
{
e
}
.
\fi
Note that the selection of functions is similar, but not identical, to
that in module
\code
{
math
}
. The reason for having two modules is,
that some users aren't interested in complex numbers, and perhaps
don't even know what they are. They would rather have
\code
{
math(-1)
}
raise an exception than return a complex number. Also note that the
functions defined in
\code
{
cmath
}
always return a complex number, even
if the answer can be expressed as a real number (in which case the
complex number has an imaginary part of zero).
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