svg

histogram.cpp

@@ -0,0 +1,53 @@
+#include "histogram.h"
+#include <vector>
+#include "histogram_internal.h"
+
+using namespace std;
+void find_minmax(const vector<double>& numbers, double& minp, double& maxp)
+{
+    minp = numbers[0];
+    for (auto i = 0; i<numbers.size(); i++)
+    {
+        if (numbers[i]<minp)
+        {
+            minp = numbers[i];
+        }
+    }
+
+    maxp = numbers[0];
+    for (auto i = 0; i<numbers.size(); i++)
+    {
+        if (numbers[i]>maxp)
+        {
+            maxp = numbers[i];
+        }
+    }
+}
+
+vector <size_t> make_histogram (const vector<double>& numbers, size_t kol_kor)
+{
+    vector<size_t>B(kol_kor);
+    size_t max_count;
+    double maxp, minp;
+    find_minmax(numbers, minp, maxp);
+    double step = (maxp-minp)/(kol_kor);
+
+    for (size_t i=0; i<numbers.size(); i++)
+    {
+        for (size_t j=0; j<kol_kor; j++)
+        {
+            if ((numbers[i]>=(minp+j*step))&&(numbers[i]<(minp+(j+1)*step)))
+            {
+                B[j]++;
+                break;
+            }
+        }
+    }
+
+    for (size_t i=0; i<numbers.size(); i++)
+    {
+        if (numbers[i]== maxp)
+            B[kol_kor-1]++;
+    }
+    return B;
+}

svg.cpp

@@ -0,0 +1,83 @@
+#include <math.h>
+#include <iostream>
+#include <conio.h>
+#include <vector>
+#include <string>
+#include "svg.h"
+using namespace std;
+
+
+void
+svg_begin(double width, double height)
+{
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg ";
+    cout << "width='" << width << "' ";
+    cout << "height='" << height << "' ";
+    cout << "viewBox='0 0 " << width << " " << height << "' ";
+    cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void
+svg_end()
+{
+    cout << "</svg>\n";
+}
+void
+svg_text(double left, double baseline, string text)
+{
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+}
+void
+svg_rect(double x, double y, double width, double height, string stroke, string fill)
+{
+    cout << "<rect x='"<<x<<"' y='"<<y<<"' width='"<<width<<"' height='"<<height<<" stroke='"<<stroke<<"' fill='"<<fill<<"' />";
+
+}
+
+void
+show_histogram_svg(const vector<size_t>& B, size_t& number_count)
+{
+    auto IMAGE_WIDTH=0;
+    const auto BLOCK_WIDTH = 10;
+    cerr << "Enter IMAGE_WIDTH:";
+    cin >> IMAGE_WIDTH;
+
+    while (IMAGE_WIDTH<70 || IMAGE_WIDTH>800 || IMAGE_WIDTH<(number_count/3.0*BLOCK_WIDTH))
+    {
+        cout<<"Error, incorrect IMAGE_WIDTH, please, re-enter\n";
+        cerr << "Enter IMAGE_WIDTH:";
+        cin >> IMAGE_WIDTH;
+    }
+
+    const auto IMAGE_HEIGHT = 300;
+    const auto TEXT_LEFT = 20;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+
+    const auto MAX_WIDTH = IMAGE_WIDTH-TEXT_WIDTH;
+
+    svg_begin(IMAGE_WIDTH,IMAGE_HEIGHT);
+
+    double top = 0;
+    double max_count = B[0];
+    for (size_t i = 0; i < B.size(); i++)
+    {
+        if (max_count<B[i])
+        {
+            max_count=B[i];
+        }
+    }
+
+    for (size_t bin : B)
+    {
+        double bin_width = (MAX_WIDTH)*(bin/max_count);
+        svg_text(TEXT_LEFT, top+TEXT_BASELINE,to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "black", "green");
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}
+