kopia lustrzana https://github.com/micropython/micropython
186 wiersze
3.4 KiB
ReStructuredText
186 wiersze
3.4 KiB
ReStructuredText
:mod:`math` -- mathematical functions
|
|
=====================================
|
|
|
|
.. module:: math
|
|
:synopsis: mathematical functions
|
|
|
|
|see_cpython_module| :mod:`python:math`.
|
|
|
|
The ``math`` module provides some basic mathematical functions for
|
|
working with floating-point numbers.
|
|
|
|
*Note:* On the pyboard, floating-point numbers have 32-bit precision.
|
|
|
|
Availability: not available on WiPy. Floating point support required
|
|
for this module.
|
|
|
|
Functions
|
|
---------
|
|
|
|
.. function:: acos(x)
|
|
|
|
Return the inverse cosine of ``x``.
|
|
|
|
.. function:: acosh(x)
|
|
|
|
Return the inverse hyperbolic cosine of ``x``.
|
|
|
|
.. function:: asin(x)
|
|
|
|
Return the inverse sine of ``x``.
|
|
|
|
.. function:: asinh(x)
|
|
|
|
Return the inverse hyperbolic sine of ``x``.
|
|
|
|
.. function:: atan(x)
|
|
|
|
Return the inverse tangent of ``x``.
|
|
|
|
.. function:: atan2(y, x)
|
|
|
|
Return the principal value of the inverse tangent of ``y/x``.
|
|
|
|
.. function:: atanh(x)
|
|
|
|
Return the inverse hyperbolic tangent of ``x``.
|
|
|
|
.. function:: ceil(x)
|
|
|
|
Return an integer, being ``x`` rounded towards positive infinity.
|
|
|
|
.. function:: copysign(x, y)
|
|
|
|
Return ``x`` with the sign of ``y``.
|
|
|
|
.. function:: cos(x)
|
|
|
|
Return the cosine of ``x``.
|
|
|
|
.. function:: cosh(x)
|
|
|
|
Return the hyperbolic cosine of ``x``.
|
|
|
|
.. function:: degrees(x)
|
|
|
|
Return radians ``x`` converted to degrees.
|
|
|
|
.. function:: erf(x)
|
|
|
|
Return the error function of ``x``.
|
|
|
|
.. function:: erfc(x)
|
|
|
|
Return the complementary error function of ``x``.
|
|
|
|
.. function:: exp(x)
|
|
|
|
Return the exponential of ``x``.
|
|
|
|
.. function:: expm1(x)
|
|
|
|
Return ``exp(x) - 1``.
|
|
|
|
.. function:: fabs(x)
|
|
|
|
Return the absolute value of ``x``.
|
|
|
|
.. function:: floor(x)
|
|
|
|
Return an integer, being ``x`` rounded towards negative infinity.
|
|
|
|
.. function:: fmod(x, y)
|
|
|
|
Return the remainder of ``x/y``.
|
|
|
|
.. function:: frexp(x)
|
|
|
|
Decomposes a floating-point number into its mantissa and exponent.
|
|
The returned value is the tuple ``(m, e)`` such that ``x == m * 2**e``
|
|
exactly. If ``x == 0`` then the function returns ``(0.0, 0)``, otherwise
|
|
the relation ``0.5 <= abs(m) < 1`` holds.
|
|
|
|
.. function:: gamma(x)
|
|
|
|
Return the gamma function of ``x``.
|
|
|
|
.. function:: isfinite(x)
|
|
|
|
Return ``True`` if ``x`` is finite.
|
|
|
|
.. function:: isinf(x)
|
|
|
|
Return ``True`` if ``x`` is infinite.
|
|
|
|
.. function:: isnan(x)
|
|
|
|
Return ``True`` if ``x`` is not-a-number
|
|
|
|
.. function:: ldexp(x, exp)
|
|
|
|
Return ``x * (2**exp)``.
|
|
|
|
.. function:: lgamma(x)
|
|
|
|
Return the natural logarithm of the gamma function of ``x``.
|
|
|
|
.. function:: log(x)
|
|
|
|
Return the natural logarithm of ``x``.
|
|
|
|
.. function:: log10(x)
|
|
|
|
Return the base-10 logarithm of ``x``.
|
|
|
|
.. function:: log2(x)
|
|
|
|
Return the base-2 logarithm of ``x``.
|
|
|
|
.. function:: modf(x)
|
|
|
|
Return a tuple of two floats, being the fractional and integral parts of
|
|
``x``. Both return values have the same sign as ``x``.
|
|
|
|
.. function:: pow(x, y)
|
|
|
|
Returns ``x`` to the power of ``y``.
|
|
|
|
.. function:: radians(x)
|
|
|
|
Return degrees ``x`` converted to radians.
|
|
|
|
.. function:: sin(x)
|
|
|
|
Return the sine of ``x``.
|
|
|
|
.. function:: sinh(x)
|
|
|
|
Return the hyperbolic sine of ``x``.
|
|
|
|
.. function:: sqrt(x)
|
|
|
|
Return the square root of ``x``.
|
|
|
|
.. function:: tan(x)
|
|
|
|
Return the tangent of ``x``.
|
|
|
|
.. function:: tanh(x)
|
|
|
|
Return the hyperbolic tangent of ``x``.
|
|
|
|
.. function:: trunc(x)
|
|
|
|
Return an integer, being ``x`` rounded towards 0.
|
|
|
|
Constants
|
|
---------
|
|
|
|
.. data:: e
|
|
|
|
base of the natural logarithm
|
|
|
|
.. data:: pi
|
|
|
|
the ratio of a circle's circumference to its diameter
|