cs-lab34/histogram.cpp

#include "histogram.h"
#include "histogram_internal.h"

using namespace std;

bool find_minmax(const vector<double>& numbers, double& min, double& max) {
    if (numbers.size() == 0) {
        return false;
    }
    min = numbers[0];
    max = numbers[0];
    for (double x : numbers) {
        if (x < min) {
            min = x;
        }
        else if (x > max) {
            max = x;
        }
    }
    return true;
}
vector<size_t> make_histogram(const vector<double> &numbers, size_t bin_count) {
    vector<size_t> bins(bin_count);
    double min,max;
    find_minmax(numbers , min , max);
    //ðàçíèöà ìåæäó ãðàíèöàìè
    double bin_size = (max - min) / bin_count;
    //ðàñïðåäåëåíèå ÷èñåë ïî êîðçèíàì
    for (size_t i = 0; i < numbers.size(); i++) {
        bool found = false;
        for (size_t j = 0; (j < bin_count - 1) && !found; j++) {
            auto lo = min + j * bin_size;
            auto hi = min + (j + 1) * bin_size;
            if ((lo <= numbers[i]) && (numbers[i] < hi)) {
                bins[j]++;
                found = true;
            }
        }
        if (!found) {
                bins[bin_count-1]++;
        }
    }
    return bins;
}