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/* The DeJong test suite.
*
*/
#include <pgapack.h>
double dejong1(PGAContext *, int, int);
double dejong2(PGAContext *, int, int);
double dejong3(PGAContext *, int, int);
double dejong4(PGAContext *, int, int);
double dejong5(PGAContext *, int, int);
void printResultInterpretation(PGAContext *, int);
int GetIntegerParameter(char *query);
int gray_on;
int BinLen[5] = { 10, 12, 10, 8, 17 };
int NumCoords[5] = { 3, 2, 5, 30, 2 };
double Lower[5] = { -5.12, -2.048, -5.12, -1.28, -65.536 };
double Upper[5] = { 5.11, 2.047, 5.11, 1.27, 65.535 };
/*******************************************************************
* user main program *
*******************************************************************/
void main( int argc, char **argv ) {
PGAContext *ctx; /* the context variable */
int testnum; /* the DeJong test to run */
int maxiter; /* the maximum number of iterations */
MPI_Init(&argc, &argv);
testnum = GetIntegerParameter("Which test? (1 - 5)\n") - 1;
gray_on = GetIntegerParameter("Gray-coded? (0 = no)\n");
maxiter = GetIntegerParameter("How many iterations?\n");
ctx = PGACreate(&argc, argv, PGA_DATATYPE_BINARY,
BinLen[testnum]*NumCoords[testnum], PGA_MINIMIZE);
PGASetMaxGAIterValue(ctx, maxiter);
PGASetRandomSeed(ctx, 1);
PGASetUp(ctx);
if (testnum == 0) PGARun(ctx, dejong1);
if (testnum == 1) PGARun(ctx, dejong2);
if (testnum == 2) PGARun(ctx, dejong3);
if (testnum == 3) PGARun(ctx, dejong4);
if (testnum == 4) PGARun(ctx, dejong5);
printResultInterpretation(ctx, testnum);
PGADestroy(ctx);
MPI_Finalize();
}
double GetTerm(PGAContext *ctx, int p, int pop, int t, int problem) {
double x;
int len;
double l, u;
len = BinLen[problem];
l = Lower[problem];
u = Upper[problem];
if (gray_on)
x = PGAGetRealFromGrayCode(ctx, p, pop, t*len, (t+1)*len-1, l, u);
else
x = PGAGetRealFromBinary(ctx, p, pop, t*len, (t+1)*len-1, l, u);
return(x);
}
double dejong1(PGAContext *ctx, int p, int pop) {
int i;
double term, sum = 0;
for(i = 0; i < NumCoords[0]; i++) {
term = GetTerm(ctx, p, pop, i, 0);
sum += (term * term);
}
return (sum);
}
double dejong2(PGAContext *ctx, int p, int pop) {
double x1, x2, p1, p2;
x1 = GetTerm(ctx, p, pop, 0, 1);
x2 = GetTerm(ctx, p, pop, 1, 1);
p1 = x1 * x1 - x2;
p2 = 1 - x1;
return (100 * p1 * p1 + p2 * p2);
}
double dejong3(PGAContext *ctx, int p, int pop) {
int i;
double sum = 0;
for(i = 0; i < NumCoords[2]; i++)
sum += floor(GetTerm(ctx, p, pop, i, 2));
return (sum);
}
double dejong4(PGAContext *ctx, int p, int pop) {
int i;
double term, sum = 0;
for(i = 0; i < NumCoords[3]; i++) {
term = GetTerm(ctx, p, pop, i, 3);
sum += ((i + 1) * term * term * term * term);
}
return (sum + PGARandomGaussian(ctx, 0, 1));
}
double dejong5(PGAContext *ctx, int p, int pop) {
int a[2][25];
int i, j;
double sum_over_i = 0, sum_over_j = 0;
for (i=0; i<5; i++) {
a[0][5*i] = -32;
a[1][i] = -32;
a[0][5*i+1] = -16;
a[1][i+5] = -16;
a[0][5*i+2] = 0;
a[1][i+10] = 0;
a[0][5*i+3] = 16;
a[1][i+15] = 16;
a[0][5*i+4] = 32;
a[1][i+20] = 32;
}
for (j = 0; j < 25; j++) {
sum_over_i =
pow(GetTerm(ctx, p, pop, 0, 4) - a[0][j], 6) +
pow(GetTerm(ctx, p, pop, 1, 4) - a[1][j], 6);
sum_over_j += (1.0 / (j + sum_over_i));
}
return (1.0 / (0.002 + sum_over_j));
}
void printResultInterpretation(PGAContext *ctx, int problem) {
int best, i;
double value;
if (PGAGetRank(ctx, MPI_COMM_WORLD) == 0) {
best = PGAGetBestIndex(ctx, PGA_OLDPOP);
printf("The real interpretation:\n");
for (i = 0; i < NumCoords[problem]; i++) {
value = GetTerm(ctx, best, PGA_OLDPOP, i, problem);
switch ( i % 5 ) {
case 0:
printf ("#%4d: [%11.7g]", i, value);
break;
case 1:
case 2:
case 3:
printf (", [%11.7g]", value);
break;
case 4:
printf (", [%11.7g]", value);
if (i+1 < NumCoords[problem])
printf ("\n");
break;
}
}
printf("\n");
}
}
/* Get an integer parameter from the user. Since this is
* typically a parallel program, we must only do I/O on the
* "master" process -- process 0. Once we read the parameter,
* we broadcast it to all the other processes, then every
* process returns the correct value.
*/
int GetIntegerParameter(char *query) {
int rank, tmp;
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (rank == 0) {
printf(query);
scanf("%d", &tmp);
}
MPI_Bcast(&tmp, 1, MPI_INT, 0, MPI_COMM_WORLD);
return(tmp);
}
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