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search_functions.c
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Wed, Aug 14, 17:15

search_functions.c
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#include <math.h>
#include "search_functions.h"
type_i argMaxSearch(type_f* x, type_i ind_start, type_i ind_end){
type_i argmax = 0;
type_f max_value = x[ind_start];
for(type_i ix = ind_start+1; ix < ind_end; ix++){
if(x[ix]>max_value){
max_value = x[ix];
argmax = ix;
}
}
return argmax;
}
void argMaxMinSearch(type_f* x, type_i ind_start, type_i ind_end, type_i* argmax_argmin){
argmax_argmin[0] = ind_start;
argmax_argmin[1] = ind_start;
type_f max_value = x[ind_start];
type_f min_value = x[ind_start];
for(type_i ix = ind_start+1; ix < ind_end; ix++){
if(x[ix]>max_value){
max_value = x[ix];
argmax_argmin[0] = ix;
}
if(x[ix]<min_value){
min_value = x[ix];
argmax_argmin[1] = ix;
}
}
}
type_i sign(type_f x){
if(x>0) return 1;
if(x<0) return -1;
return 0;
}
type_i argMaxProductSignSearch(type_f* x, type_f* x2, type_i ind_start, type_i ind_end){
type_i argmax = 0;
type_f max_value = 0;
type_f product_arrays = 0;
max_value = x[ind_start]*sign(x2[ind_start]);
for(type_i ix = ind_start+1; ix < ind_end; ix++){
product_arrays = x[ix]*sign(x2[ix]);
if(product_arrays>max_value){
max_value = product_arrays;
argmax = ix;
}
}
return argmax;
}
void argMaxMinProductSignSearch(type_f* x, type_f* x2, type_i ind_start, type_i ind_end, type_i* argmax_argmin){
argmax_argmin[0] = ind_start;
argmax_argmin[1] = ind_start;
type_f max_value = 0;
type_f min_value = 0;
type_f product_arrays = 0;
max_value = x[ind_start]*sign(x2[ind_start]);
min_value = x[ind_start]*sign(x2[ind_start]);
for(type_i ix = ind_start+1; ix < ind_end; ix++){
product_arrays = x[ix]*sign(x2[ix]);
if(product_arrays>max_value){
max_value = product_arrays;
argmax_argmin[0] = ix;
}
if(product_arrays<min_value){
min_value = product_arrays;
argmax_argmin[1] = ix;
}
}
}

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