File: _constants.py

package info (click to toggle)
python-scipy 0.18.1-2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 75,464 kB
  • ctags: 79,406
  • sloc: python: 143,495; cpp: 89,357; fortran: 81,650; ansic: 79,778; makefile: 364; sh: 265
file content (27 lines) | stat: -rw-r--r-- 696 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
"""
Statistics-related constants.

"""
from __future__ import division, print_function, absolute_import

import numpy as np


# The smallest representable positive number such that 1.0 + _EPS != 1.0.
_EPS = np.finfo(float).eps

# The largest [in magnitude] usable floating value.
_XMAX = np.finfo(float).machar.xmax

# The log of the largest usable floating value; useful for knowing
# when exp(something) will overflow
_LOGXMAX = np.log(_XMAX)

# The smallest [in magnitude] usable floating value.
_XMIN = np.finfo(float).machar.xmin

# -special.psi(1)
_EULER = 0.577215664901532860606512090082402431042

# special.zeta(3, 1)  Apery's constant
_ZETA3 = 1.202056903159594285399738161511449990765