1 | /* |
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2 | * |
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3 | * ********************************************************************* |
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4 | * (C) COPYRIGHT 1995 UNIVERSITY OF CHICAGO |
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5 | * ********************************************************************* |
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6 | * |
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7 | * This software was authored by |
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8 | * |
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9 | * D. Levine |
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10 | * Mathematics and Computer Science Division Argonne National Laboratory |
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11 | * Argonne IL 60439 |
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12 | * levine@mcs.anl.gov |
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13 | * (708) 252-6735 |
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14 | * (708) 252-5986 (FAX) |
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15 | * |
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16 | * with programming assistance of participants in Argonne National |
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17 | * Laboratory's SERS program. |
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18 | * |
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19 | * This program contains material protectable under copyright laws of the |
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20 | * United States. Permission is hereby granted to use it, reproduce it, |
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21 | * to translate it into another language, and to redistribute it to |
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22 | * others at no charge except a fee for transferring a copy, provided |
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23 | * that you conspicuously and appropriately publish on each copy the |
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24 | * University of Chicago's copyright notice, and the disclaimer of |
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25 | * warranty and Government license included below. Further, permission |
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26 | * is hereby granted, subject to the same provisions, to modify a copy or |
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27 | * copies or any portion of it, and to distribute to others at no charge |
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28 | * materials containing or derived from the material. |
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29 | * |
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30 | * The developers of the software ask that you acknowledge its use in any |
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31 | * document referencing work based on the program, such as published |
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32 | * research. Also, they ask that you supply to Argonne National |
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33 | * Laboratory a copy of any published research referencing work based on |
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34 | * the software. |
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35 | * |
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36 | * Any entity desiring permission for further use must contact: |
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37 | * |
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38 | * J. Gleeson |
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39 | * Industrial Technology Development Center Argonne National Laboratory |
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40 | * Argonne IL 60439 |
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41 | * gleesonj@smtplink.eid.anl.gov |
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42 | * (708) 252-6055 |
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43 | * |
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44 | * ******************************************************************** |
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45 | * DISCLAIMER |
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46 | * |
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47 | * THIS PROGRAM WAS PREPARED AS AN ACCOUNT OF WORK SPONSORED BY AN AGENCY |
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48 | * OF THE UNITED STATES GOVERNMENT. NEITHER THE UNIVERSITY OF CHICAGO, |
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49 | * THE UNITED STATES GOVERNMENT NOR ANY OF THEIR EMPLOYEES MAKE ANY |
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50 | * WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LEGAL LIABILITY OR |
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51 | * RESPONSIBILITY FOR THE ACCURACY, COMPLETENESS, OR USEFULNESS OF ANY |
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52 | * INFORMATION OR PROCESS DISCLOSED, OR REPRESENTS THAT ITS USE WOULD NOT |
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53 | * INFRINGE PRIVATELY OWNED RIGHTS. |
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54 | * |
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55 | * ********************************************************************** |
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56 | * GOVERNMENT LICENSE |
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57 | * |
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58 | * The Government is granted for itself and others acting on its behalf a |
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59 | * paid-up, non-exclusive, irrevocable worldwide license in this computer |
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60 | * software to reproduce, prepare derivative works, and perform publicly |
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61 | * and display publicly. |
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62 | */ |
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63 | |
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64 | /***************************************************************************** |
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65 | * FILE: crossover.c: This file contains the data structure neutral |
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66 | * crossover routines. |
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67 | * |
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68 | * Authors: David M. Levine, Philip L. Hallstrom, David M. Noelle, |
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69 | * Brian P. Walenz |
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70 | *****************************************************************************/ |
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71 | |
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72 | #include "pgapack.h" |
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73 | |
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74 | /*U**************************************************************************** |
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75 | PGACrossover - performs crossover on two parent strings to create two |
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76 | child strings (via side-effect). The type of crossover performed is |
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77 | either the default or that specified by PGASetCrossoverType |
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78 | |
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79 | Category: Operators |
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80 | |
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81 | Inputs: |
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82 | ctx - context variable |
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83 | p1 - the first parent string |
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84 | p2 - the second parent string |
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85 | pop1 - symbolic constant of the population containing string p1 and p2 |
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86 | c1 - the first child string |
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87 | c2 - the second child string |
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88 | pop2 - symbolic constant of the population to contain string c1 and c2 |
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89 | |
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90 | Outputs: |
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91 | c1 and c2 in pop2 are children of p1 and p2 in pop1. p1 and p2 are not |
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92 | modified. |
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93 | |
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94 | Example: |
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95 | Perform crossover on the two parent strings mom and dad in population |
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96 | PGA_OLDPOP, and insert the child strings, child1 and child1, in |
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97 | population PGA_NEWPOP. |
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98 | |
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99 | PGAContext *ctx; |
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100 | int mom, dad, child1, child2; |
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101 | : |
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102 | PGACrossover(ctx, mom, dad, PGA_OLDPOP, child1, child2, PGA_NEWPOP); |
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103 | |
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104 | ****************************************************************************U*/ |
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105 | void PGACrossover ( PGAContext *ctx, int p1, int p2, int pop1, |
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106 | int c1, int c2, int pop2 ) |
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107 | { |
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108 | int fp1, fp2, fc1, fc2; |
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109 | |
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110 | PGADebugEntered("PGACrossover"); |
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111 | PGADebugPrint( ctx, PGA_DEBUG_PRINTVAR, "PGACrossover", " p1 = ", |
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112 | PGA_INT, (void *) &p1 ); |
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113 | PGADebugPrint( ctx, PGA_DEBUG_PRINTVAR, "PGACrossover", " p2 = ", |
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114 | PGA_INT, (void *) &p2 ); |
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115 | PGADebugPrint( ctx, PGA_DEBUG_PRINTVAR, "PGACrossover", " c1 = ", |
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116 | PGA_INT, (void *) &c1 ); |
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117 | PGADebugPrint( ctx, PGA_DEBUG_PRINTVAR, "PGACrossover", " c2 = ", |
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118 | PGA_INT, (void *) &c2 ); |
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119 | |
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120 | if (ctx->fops.Crossover) { |
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121 | fp1 = ((p1 == PGA_TEMP1) || (p1 == PGA_TEMP2)) ? p1 : p1+1; |
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122 | fp2 = ((p2 == PGA_TEMP1) || (p2 == PGA_TEMP2)) ? p2 : p2+1; |
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123 | fc1 = ((c1 == PGA_TEMP1) || (c1 == PGA_TEMP2)) ? c1 : c1+1; |
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124 | fc2 = ((c2 == PGA_TEMP1) || (c2 == PGA_TEMP2)) ? c2 : c2+1; |
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125 | (*ctx->fops.Crossover)(&ctx, &fp1, &fp2, &pop1, &fc1, &fc2, &pop2); |
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126 | } else { |
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127 | (*ctx->cops.Crossover)(ctx, p1, p2, pop1, c1, c2, pop2); |
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128 | } |
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129 | |
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130 | PGASetEvaluationUpToDateFlag(ctx, c1, pop2, PGA_FALSE); |
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131 | PGASetEvaluationUpToDateFlag(ctx, c2, pop2, PGA_FALSE); |
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132 | |
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133 | PGADebugExited("PGACrossover"); |
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134 | } |
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135 | |
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136 | /*U*************************************************************************** |
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137 | PGAGetCrossoverType - Returns the type of crossover selected |
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138 | |
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139 | Category: Operators |
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140 | |
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141 | Inputs: |
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142 | ctx - context variable |
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143 | |
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144 | Outputs: |
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145 | Returns the integer corresponding to the symbolic constant |
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146 | used to specify the crossover type |
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147 | |
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148 | Example: |
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149 | PGAContext *ctx; |
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150 | int crosstype; |
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151 | : |
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152 | crosstype = PGAGetCrossoverType(ctx); |
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153 | switch (crosstype) { |
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154 | case PGA_CROSSOVER_ONEPT: |
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155 | printf("Crossover Type = PGA_CROSSOVER_ONEPT\n"); |
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156 | break; |
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157 | case PGA_CROSSOVER_TWOPT: |
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158 | printf("Crossover Type = PGA_CROSSOVER_TWOPT\n"); |
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159 | break; |
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160 | case PGA_CROSSOVER_UNIFORM: |
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161 | printf("Crossover Type = PGA_CROSSOVER_UNIFORM\n"); |
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162 | break; |
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163 | } |
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164 | |
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165 | ***************************************************************************U*/ |
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166 | int PGAGetCrossoverType (PGAContext *ctx) |
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167 | { |
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168 | PGADebugEntered("PGAGetCrossoverType"); |
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169 | |
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170 | PGAFailIfNotSetUp("PGAGetCrossoverType"); |
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171 | |
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172 | PGADebugExited("PGAGetCrossoverType"); |
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173 | |
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174 | return(ctx->ga.CrossoverType); |
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175 | } |
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176 | |
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177 | /*U*************************************************************************** |
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178 | PGAGetCrossoverProb - Returns the crossover probability |
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179 | |
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180 | Category: Operators |
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181 | |
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182 | Inputs: |
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183 | ctx - context variable |
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184 | |
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185 | Outputs: |
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186 | The crossover probability |
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187 | |
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188 | Example: |
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189 | PGAContext *ctx; |
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190 | double pc; |
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191 | : |
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192 | pc = PGAGetCrossoverProb(ctx); |
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193 | |
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194 | ***************************************************************************U*/ |
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195 | double PGAGetCrossoverProb (PGAContext *ctx) |
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196 | { |
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197 | PGADebugEntered("PGAGetCrossoverProb"); |
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198 | |
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199 | PGAFailIfNotSetUp("PGAGetCrossoverProb"); |
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200 | |
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201 | PGADebugExited("PGAGetCrossoverProb"); |
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202 | |
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203 | return(ctx->ga.CrossoverProb); |
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204 | } |
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205 | |
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206 | /*U*************************************************************************** |
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207 | PGAGetUniformCrossoverProb - returns the probability of a bit being |
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208 | selected from the first child string in uniform crossover |
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209 | |
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210 | Category: Operators |
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211 | |
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212 | Inputs: |
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213 | ctx - context variable |
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214 | |
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215 | Outputs: |
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216 | The uniform crossover probability |
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217 | |
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218 | Example: |
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219 | PGAContext *ctx; |
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220 | double pu; |
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221 | : |
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222 | pu = PGAGetUniformCrossoverProb(ctx); |
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223 | |
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224 | ***************************************************************************U*/ |
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225 | double PGAGetUniformCrossoverProb (PGAContext *ctx) |
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226 | { |
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227 | PGADebugEntered("PGAGetUniformCrossoverProb"); |
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228 | |
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229 | PGAFailIfNotSetUp("PGAGetUniformCrossoverProb"); |
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230 | |
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231 | PGADebugExited("PGAGetUniformCrossoverProb"); |
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232 | |
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233 | return(ctx->ga.UniformCrossProb); |
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234 | } |
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235 | |
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236 | /*U**************************************************************************** |
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237 | PGASetCrossoverType - specify the type of crossover to use. Valid choices |
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238 | are PGA_CROSSOVER_ONEPT, PGA_CROSSOVER_TWOPT, or PGA_CROSSOVER_UNIFORM for |
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239 | one-point, two-point, and uniform crossover, respectively. The default is |
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240 | PGA_CROSSOVER_TWOPT. |
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241 | |
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242 | Category: Operators |
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243 | |
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244 | Inputs: |
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245 | ctx - context variable |
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246 | crossover_type - symbolic constant to specify crossover type |
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247 | |
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248 | Outputs: |
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249 | None |
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250 | |
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251 | Example: |
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252 | Use uniform crossover when crossingover strings. |
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253 | |
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254 | PGAContext *ctx; |
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255 | : |
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256 | PGASetCrossoverType(ctx, PGA_CROSSOVER_UNIFORM); |
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257 | |
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258 | ****************************************************************************U*/ |
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259 | void PGASetCrossoverType (PGAContext *ctx, int crossover_type) |
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260 | { |
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261 | |
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262 | PGADebugEntered("PGASetCrossoverType"); |
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263 | |
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264 | switch (crossover_type) { |
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265 | case PGA_CROSSOVER_ONEPT: |
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266 | case PGA_CROSSOVER_TWOPT: |
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267 | case PGA_CROSSOVER_UNIFORM: |
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268 | case PGA_CROSSOVER_SBX: |
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269 | case PGA_CROSSOVER_TRIANGULAR: |
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270 | ctx->ga.CrossoverType = crossover_type; |
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271 | break; |
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272 | default: |
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273 | PGAError( ctx, |
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274 | "PGASetCrossoverType: Invalid value of crossover_type:", |
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275 | PGA_FATAL, PGA_INT, (void *) &crossover_type ); |
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276 | }; |
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277 | |
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278 | PGADebugExited("PGASetCrossoverType"); |
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279 | } |
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280 | |
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281 | |
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282 | /*U**************************************************************************** |
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283 | PGASetCrossoverProb - Probability that a selected string will undergo |
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284 | crossover. The default is 0.85. |
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285 | |
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286 | Category: Operators |
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287 | |
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288 | Inputs: |
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289 | ctx - context variable |
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290 | p - the crossover probability |
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291 | |
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292 | Outputs: |
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293 | None |
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294 | |
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295 | Example: |
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296 | Make crossover happen infrequently. |
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297 | |
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298 | PGAContext *ctx; |
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299 | : |
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300 | PGASetCrossoverProb(ctx,0.001); |
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301 | |
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302 | ****************************************************************************U*/ |
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303 | void PGASetCrossoverProb( PGAContext *ctx, double crossover_prob) |
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304 | { |
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305 | PGADebugEntered("PGASetCrossoverProb"); |
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306 | |
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307 | if ((crossover_prob < 0.0) || (crossover_prob > 1.0)) |
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308 | PGAError ( ctx, |
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309 | "PGASetCrossoverProb: Invalid value of crossover_prob:", |
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310 | PGA_FATAL, PGA_DOUBLE, (void *) &crossover_prob); |
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311 | else |
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312 | ctx->ga.CrossoverProb = crossover_prob; |
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313 | |
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314 | PGADebugExited("PGASetCrossoverProb"); |
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315 | } |
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316 | |
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317 | /*U**************************************************************************** |
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318 | PGASetUniformCrossoverProb - Probability used in uniform crossover |
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319 | to specify that an allele value value be selected from a particular |
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320 | parent. The default is 0.6. The crossover type must have been set |
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321 | to PGA_CROSSOVER_UNIFORM with PGASetCrossoverType for this function |
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322 | call to have any effect. |
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323 | |
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324 | Category: Operators |
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325 | |
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326 | Inputs: |
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327 | ctx - context variable |
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328 | p - the crossover probability |
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329 | |
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330 | Outputs: |
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331 | None |
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332 | |
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333 | Example: |
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334 | PGAContext *ctx; |
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335 | : |
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336 | PGASetUniformCrossoverProb(ctx,0.9); |
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337 | |
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338 | ****************************************************************************U*/ |
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339 | void PGASetUniformCrossoverProb( PGAContext *ctx, double uniform_cross_prob) |
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340 | { |
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341 | PGADebugEntered("PGASetUniformCrossoverProb"); |
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342 | |
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343 | if ((uniform_cross_prob < 0.0) || (uniform_cross_prob > 1.0)) |
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344 | PGAError ( ctx, |
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345 | "PGASetUniformCrossoverProb: Invalid value of " |
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346 | "uniform_cross_prob:", PGA_FATAL, PGA_DOUBLE, |
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347 | (void *) &uniform_cross_prob); |
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348 | else |
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349 | ctx->ga.UniformCrossProb = uniform_cross_prob; |
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350 | |
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351 | PGADebugExited("PGASetUniformCrossoverProb"); |
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352 | } |
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