diff options
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/statistics.rst | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Doc/library/statistics.rst b/Doc/library/statistics.rst index 197c123..873ccd6 100644 --- a/Doc/library/statistics.rst +++ b/Doc/library/statistics.rst @@ -1163,7 +1163,7 @@ accurately approximated inverse cumulative distribution function. .. testcode:: from random import choice, random, seed - from math import sqrt, log, pi, tan, asin + from math import sqrt, log, pi, tan, asin, cos, acos from statistics import NormalDist kernel_invcdfs = { @@ -1172,6 +1172,7 @@ accurately approximated inverse cumulative distribution function. 'sigmoid': lambda p: log(tan(p * pi/2)), 'rectangular': lambda p: 2*p - 1, 'triangular': lambda p: sqrt(2*p) - 1 if p < 0.5 else 1 - sqrt(2 - 2*p), + 'parabolic': lambda p: 2 * cos((acos(2*p-1) + pi) / 3), 'cosine': lambda p: 2*asin(2*p - 1)/pi, } |