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Showing content from http://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/doxyhtml/boost__erf_8c_source.html below:

NCBI C++ ToolKit: src/algo/blast/core/boost_erf.c Source File

79  static const double

c = 0.003379167095512573896158903121545171688;

80  result

= z * 1.125 + z * c;

90  static const double

Y = 1.044948577880859375;

91  static const double P

[] = {0.0834305892146531832907,

92

-0.338165134459360935041,

93

-0.0509990735146777432841,

94

-0.00772758345802133288487,

95

-0.000322780120964605683831};

97  static const double

Q[] = {1.0,

98

0.455004033050794024546,

99

0.0875222600142252549554,

100

0.00858571925074406212772,

101

0.000370900071787748000569};

105  double

p = (((

P

[4] * zz +

P

[3]) * zz +

P

[2]) * zz +

P

[1]) * zz +

P

[0];

106  double

q = (((Q[4] * zz + Q[3]) * zz + Q[2]) * zz + Q[1]) * zz + Q[0];

111  else if

(

invert

? (z < 28.0) : (z < 5.8)) {

122  static const double

Y = 0.405935764312744140625;

123  static const double P

[] = {-0.098090592216281240205,

124

0.178114665841120341155,

125

0.191003695796775433986,

126

0.0888900368967884466578,

127

0.0195049001251218801359,

128

0.00180424538297014223957};

130  static const double

Q[] = {1.0,

131

1.84759070983002217845,

132

1.42628004845511324508,

133

0.578052804889902404909,

134

0.12385097467900864233,

135

0.0113385233577001411017,

136

0.337511472483094676155e-5};

139  double

p = ((((

P

[5] * x +

P

[4]) * x +

P

[3]) * x +

P

[2]) * x +

P

[1]) * x +

P

[0];

140  double

q = ((((Q[5] * x + Q[4]) * x + Q[3]) * x + Q[2]) * x + Q[1]) * x + Q[0];

143  result

*= expl(-z * z) / z;

151  static const double

Y = 0.50672817230224609375;

152  static const double P

[] = {-0.0243500476207698441272,

153

0.0386540375035707201728,

154

0.04394818964209516296,

155

0.0175679436311802092299,

156

0.00323962406290842133584,

157

0.000235839115596880717416};

159  static const double

Q[] = {1.0,

160

1.53991494948552447182,

161

0.982403709157920235114,

162

0.325732924782444448493,

163

0.0563921837420478160373,

164

0.00410369723978904575884};

167  double

p = ((((

P

[5] * x +

P

[4]) * x +

P

[3]) * x +

P

[2]) * x +

P

[1]) * x +

P

[0];

168  double

q = ((((Q[5] * x + Q[4]) * x + Q[3]) * x + Q[2]) * x + Q[1]) * x + Q[0];

171  result

*= expl(-z * z) / z;

179  static const double

Y = 0.5405750274658203125;

180  static const double P

[] = {0.00295276716530971662634,

181

0.0137384425896355332126,

182

0.00840807615555585383007,

183

0.00212825620914618649141,

184

0.000250269961544794627958,

185

0.113212406648847561139e-4};

187  static const double

Q[] = {1.0,

188

1.04217814166938418171,

189

0.442597659481563127003,

190

0.0958492726301061423444,

191

0.0105982906484876531489,

192

0.000479411269521714493907};

195  double

p = ((((

P

[5] * x +

P

[4]) * x +

P

[3]) * x +

P

[2]) * x +

P

[1]) * x +

P

[0];

196  double

q = ((((Q[5] * x + Q[4]) * x + Q[3]) * x + Q[2]) * x + Q[1]) * x + Q[0];

199  result

*= expl(-z * z) / z;

207  static const double

Y = 0.5579090118408203125;

208  static const double P

[] = {0.00628057170626964891937,

209

0.0175389834052493308818,

210

-0.212652252872804219852,

211

-0.687717681153649930619,

212

-2.5518551727311523996,

213

-3.22729451764143718517,

214

-2.8175401114513378771};

216  static const double

Q[] = {1.0,

217

2.79257750980575282228,

218

11.0567237927800161565,

219

15.930646027911794143,

220

22.9367376522880577224,

221

13.5064170191802889145,

222

5.48409182238641741584};

225  double

p = (((((

P

[6] * x +

P

[5]) * x +

P

[4]) * x +

P

[3]) * x +

P

[2]) * x +

P

[1]) * x +

P

[0];

226  double

q = (((((Q[6] * x + Q[5]) * x + Q[4]) * x + Q[3]) * x + Q[2]) * x + Q[1]) * x + Q[0];

229  result

*= expl(-z * z) / z;

double ErfC(double z)

Complementary error function.

double Erf(double z)

Error function.

static double ErfImpl(double z, int invert)


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