@@ -766,74 +766,63 @@ def inv_cdf(self, p):
766766
767767 q = p - 0.5
768768 if fabs (q ) <= 0.425 :
769- a0 = 3.38713_28727_96366_6080e+0
770- a1 = 1.33141_66789_17843_7745e+2
771- a2 = 1.97159_09503_06551_4427e+3
772- a3 = 1.37316_93765_50946_1125e+4
773- a4 = 4.59219_53931_54987_1457e+4
774- a5 = 6.72657_70927_00870_0853e+4
775- a6 = 3.34305_75583_58812_8105e+4
776- a7 = 2.50908_09287_30122_6727e+3
777- b1 = 4.23133_30701_60091_1252e+1
778- b2 = 6.87187_00749_20579_0830e+2
779- b3 = 5.39419_60214_24751_1077e+3
780- b4 = 2.12137_94301_58659_5867e+4
781- b5 = 3.93078_95800_09271_0610e+4
782- b6 = 2.87290_85735_72194_2674e+4
783- b7 = 5.22649_52788_52854_5610e+3
784769 r = 0.180625 - q * q
785- num = (q * (((((((a7 * r + a6 ) * r + a5 ) * r + a4 ) * r + a3 )
786- * r + a2 ) * r + a1 ) * r + a0 ))
787- den = ((((((((b7 * r + b6 ) * r + b5 ) * r + b4 ) * r + b3 )
788- * r + b2 ) * r + b1 ) * r + 1.0 ))
770+ num = (((((((2.50908_09287_30122_6727e+3 * r +
771+ 3.34305_75583_58812_8105e+4 ) * r +
772+ 6.72657_70927_00870_0853e+4 ) * r +
773+ 4.59219_53931_54987_1457e+4 ) * r +
774+ 1.37316_93765_50946_1125e+4 ) * r +
775+ 1.97159_09503_06551_4427e+3 ) * r +
776+ 1.33141_66789_17843_7745e+2 ) * r +
777+ 3.38713_28727_96366_6080e+0 ) * q
778+ den = (((((((5.22649_52788_52854_5610e+3 * r +
779+ 2.87290_85735_72194_2674e+4 ) * r +
780+ 3.93078_95800_09271_0610e+4 ) * r +
781+ 2.12137_94301_58659_5867e+4 ) * r +
782+ 5.39419_60214_24751_1077e+3 ) * r +
783+ 6.87187_00749_20579_0830e+2 ) * r +
784+ 4.23133_30701_60091_1252e+1 ) * r +
785+ 1.0 )
789786 x = num / den
790787 return self .mu + (x * self .sigma )
791-
792788 r = p if q <= 0.0 else 1.0 - p
793789 r = sqrt (- log (r ))
794790 if r <= 5.0 :
795- c0 = 1.42343_71107_49683_57734e+0
796- c1 = 4.63033_78461_56545_29590e+0
797- c2 = 5.76949_72214_60691_40550e+0
798- c3 = 3.64784_83247_63204_60504e+0
799- c4 = 1.27045_82524_52368_38258e+0
800- c5 = 2.41780_72517_74506_11770e-1
801- c6 = 2.27238_44989_26918_45833e-2
802- c7 = 7.74545_01427_83414_07640e-4
803- d1 = 2.05319_16266_37758_82187e+0
804- d2 = 1.67638_48301_83803_84940e+0
805- d3 = 6.89767_33498_51000_04550e-1
806- d4 = 1.48103_97642_74800_74590e-1
807- d5 = 1.51986_66563_61645_71966e-2
808- d6 = 5.47593_80849_95344_94600e-4
809- d7 = 1.05075_00716_44416_84324e-9
810791 r = r - 1.6
811- num = ((((((((c7 * r + c6 ) * r + c5 ) * r + c4 ) * r + c3 )
812- * r + c2 ) * r + c1 ) * r + c0 ))
813- den = ((((((((d7 * r + d6 ) * r + d5 ) * r + d4 ) * r + d3 )
814- * r + d2 ) * r + d1 ) * r + 1.0 ))
792+ num = (((((((7.74545_01427_83414_07640e-4 * r +
793+ 2.27238_44989_26918_45833e-2 ) * r +
794+ 2.41780_72517_74506_11770e-1 ) * r +
795+ 1.27045_82524_52368_38258e+0 ) * r +
796+ 3.64784_83247_63204_60504e+0 ) * r +
797+ 5.76949_72214_60691_40550e+0 ) * r +
798+ 4.63033_78461_56545_29590e+0 ) * r +
799+ 1.42343_71107_49683_57734e+0 )
800+ den = (((((((1.05075_00716_44416_84324e-9 * r +
801+ 5.47593_80849_95344_94600e-4 ) * r +
802+ 1.51986_66563_61645_71966e-2 ) * r +
803+ 1.48103_97642_74800_74590e-1 ) * r +
804+ 6.89767_33498_51000_04550e-1 ) * r +
805+ 1.67638_48301_83803_84940e+0 ) * r +
806+ 2.05319_16266_37758_82187e+0 ) * r +
807+ 1.0 )
815808 else :
816- e0 = 6.65790_46435_01103_77720e+0
817- e1 = 5.46378_49111_64114_36990e+0
818- e2 = 1.78482_65399_17291_33580e+0
819- e3 = 2.96560_57182_85048_91230e-1
820- e4 = 2.65321_89526_57612_30930e-2
821- e5 = 1.24266_09473_88078_43860e-3
822- e6 = 2.71155_55687_43487_57815e-5
823- e7 = 2.01033_43992_92288_13265e-7
824- f1 = 5.99832_20655_58879_37690e-1
825- f2 = 1.36929_88092_27358_05310e-1
826- f3 = 1.48753_61290_85061_48525e-2
827- f4 = 7.86869_13114_56132_59100e-4
828- f5 = 1.84631_83175_10054_68180e-5
829- f6 = 1.42151_17583_16445_88870e-7
830- f7 = 2.04426_31033_89939_78564e-15
831809 r = r - 5.0
832- num = ((((((((e7 * r + e6 ) * r + e5 ) * r + e4 ) * r + e3 )
833- * r + e2 ) * r + e1 ) * r + e0 ))
834- den = ((((((((f7 * r + f6 ) * r + f5 ) * r + f4 ) * r + f3 )
835- * r + f2 ) * r + f1 ) * r + 1.0 ))
836-
810+ num = (((((((2.01033_43992_92288_13265e-7 * r +
811+ 2.71155_55687_43487_57815e-5 ) * r +
812+ 1.24266_09473_88078_43860e-3 ) * r +
813+ 2.65321_89526_57612_30930e-2 ) * r +
814+ 2.96560_57182_85048_91230e-1 ) * r +
815+ 1.78482_65399_17291_33580e+0 ) * r +
816+ 5.46378_49111_64114_36990e+0 ) * r +
817+ 6.65790_46435_01103_77720e+0 )
818+ den = (((((((2.04426_31033_89939_78564e-15 * r +
819+ 1.42151_17583_16445_88870e-7 ) * r +
820+ 1.84631_83175_10054_68180e-5 ) * r +
821+ 7.86869_13114_56132_59100e-4 ) * r +
822+ 1.48753_61290_85061_48525e-2 ) * r +
823+ 1.36929_88092_27358_05310e-1 ) * r +
824+ 5.99832_20655_58879_37690e-1 ) * r +
825+ 1.0 )
837826 x = num / den
838827 if q < 0.0 :
839828 x = - x
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