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src/c/o/cogent-1.5.3/cogent/maths/stats/distribution.py   cogent(Download)
"""
from __future__ import division
from cogent.maths.stats.special import erf, erfc, igamc, igam, betai, log1p, \
    expm1, SQRTH, MACHEP, MAXNUM, PI, ndtri, incbi, igami, fix_rounding_error,\
    ln_binomial
    if k == 0:
        if p < .01:
            dk = -expm1(dn * log1p(-p))
        else:
            dk = 1 - pow(1.0-p, dn)
    if k == 0:
        if y > 0.8:
            p = -expm1(log1p(y-1.0) / dn)
        else:
            p = 1.0 - y**(1.0/dn)

src/p/y/pycogent-HEAD/cogent/maths/stats/distribution.py   pycogent(Download)
"""
from __future__ import division
from cogent.maths.stats.special import erf, erfc, igamc, igam, betai, log1p, \
    expm1, SQRTH, MACHEP, MAXNUM, PI, ndtri, incbi, igami, fix_rounding_error,\
    ln_binomial
    if k == 0:
        if p < .01:
            dk = -expm1(dn * log1p(-p))
        else:
            dk = 1 - pow(1.0-p, dn)
    if k == 0:
        if y > 0.8:
            p = -expm1(log1p(y-1.0) / dn)
        else:
            p = 1.0 - y**(1.0/dn)