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| void
RandomExcursionsVariant(int n)
{
int i, p, J, x, constraint, count, *S_k;
int stateX[18] = { -9, -8, -7, -6, -5, -4, -3, -2, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
double p_value;
if ( (S_k = (int *)calloc(n, sizeof(int))) == NULL ) {
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\tRANDOM EXCURSIONS VARIANT: Insufficent memory allocated.\n");
return;
}
J = 0;
S_k[0] = 2*(int)epsilon[0] - 1;
for ( i=1; i<n; i++ ) {
S_k[i] = S_k[i-1] + 2*epsilon[i] - 1;
if ( S_k[i] == 0 )
J++;
}
if ( S_k[n-1] != 0 )
J++;
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t\tRANDOM EXCURSIONS VARIANT TEST\n");
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t--------------------------------------------\n");
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\tCOMPUTATIONAL INFORMATION:\n");
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t--------------------------------------------\n");
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t(a) Number Of Cycles (J) = %d\n", J);
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t(b) Sequence Length (n) = %d\n", n);
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t--------------------------------------------\n");
constraint = (int)MAX(0.005*pow(n, 0.5), 500);
if (J < constraint) {
fprintf(stats[TEST_RND_EXCURSION_VAR], "\n\t\tWARNING: TEST NOT APPLICABLE. THERE ARE AN\n");
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t\t INSUFFICIENT NUMBER OF CYCLES.\n");
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t---------------------------------------------\n");
for ( i=0; i<18; i++ )
fprintf(results[TEST_RND_EXCURSION_VAR], "%f\n", 0.0);
}
else {
for ( p=0; p<=17; p++ ) {
x = stateX[p];
count = 0;
for ( i=0; i<n; i++ )
if ( S_k[i] == x )
count++;
p_value = erfc(fabs(count-J)/(sqrt(2.0*J*(4.0*fabs(x)-2))));
if ( isNegative(p_value) || isGreaterThanOne(p_value) )
fprintf(stats[TEST_RND_EXCURSION_VAR], "\t\t(b) WARNING: P_VALUE IS OUT OF RANGE.\n");
fprintf(stats[TEST_RND_EXCURSION_VAR], "%s\t\t", p_value < ALPHA ? "FAILURE" : "SUCCESS");
fprintf(stats[TEST_RND_EXCURSION_VAR], "(x = %2d) Total visits = %4d; p-value = %f\n", x, count, p_value);
fprintf(results[TEST_RND_EXCURSION_VAR], "%f\n", p_value); fflush(results[TEST_RND_EXCURSION_VAR]);
}
}
fprintf(stats[TEST_RND_EXCURSION_VAR], "\n"); fflush(stats[TEST_RND_EXCURSION_VAR]);
free(S_k);
} |
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