Родитель
479391830c
Сommit
9adf811db7
@ -0,0 +1,45 @@
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#include "histogram.h"
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#include <vector>
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static void find_minmax(const std::vector <double> &numbers, double &min, double &max)
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{
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min = numbers[0];
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max = numbers[0];
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for (double x : numbers)
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{
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if (x < min)
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{
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min = x;
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}
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else if (x > max)
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{
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max = x;
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}
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}
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}
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std::vector<std::size_t> make_histogram(const std::vector<double> &numbers, std::size_t bin_count)
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{
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double min, max;
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find_minmax(numbers, min, max);
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double bin_size = (max - min) / bin_count;
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std::vector <std::size_t> bins (bin_count);
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for (std::size_t i = 0; i < numbers.size(); i++)
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{
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bool found = false;
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for (std::size_t j = 0; (j < bin_count - 1) && !found; j++)
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{
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auto lo = min + j * bin_size;
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auto hi = min + (j+1) * bin_size;
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if ((lo <= numbers[i]) && (numbers[i] < hi))
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{
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bins[j]++;
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found = true;
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}
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}
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if (!found)
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{
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bins[bin_count - 1]++;
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}
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}
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return bins;
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}
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@ -0,0 +1,9 @@
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#ifndef HISTOGRAM_H_INCLUDED
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#define HISTOGRAM_H_INCLUDED
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#include <vector>
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std::vector<size_t>
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make_histogram(const std::vector<double>& numbers, size_t bin_count);
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#endif // HISTOGRAM_H_INCLUDED
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