code: файлы функций

histogram.cpp

@@ -35,3 +35,16 @@ make_histogram(const std::vector<double>& numbers, size_t bin_count){
     }
     return bins;
 }
+
+
+std::vector<double>
+make_borders(const std::vector<double>& numbers, size_t bin_count){
+    double min, max;
+    find_minmax(numbers, min, max);
+    double diff = (max - min) / bin_count;
+    std::vector <double> borders(bin_count - 1);
+    for (size_t i = 0; i <= bin_count - 2; i++){
+        borders[i] = min + (i + 1) * diff;
+    }
+    return borders;
+}

svg.cpp

@@ -0,0 +1,65 @@
+#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 = "black" , string fill = "balck"){
+    cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height <<"' stroke='" << stroke << "' fill='" << fill << "' />";
+
+}
+
+void
+show_histogram_svg(const vector<size_t>& bins, const std::vector<double>& borders, size_t bin_count) {
+    const auto IMAGE_WIDTH = 400;
+    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 BLOCK_WIDTH = 10;
+    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+    vector <string> colors = {"crimson", "darkorange", "gold", "lime", "aqua", "dodgerblue", "mediumpurple"};
+    size_t max_bin = *max_element(bins.begin(), bins.end());
+    size_t number_of_blocks;
+    double top = 0;
+    size_t color = 0;
+    size_t border = 0;
+    for (size_t bin: bins){
+        number_of_blocks = bin;
+        if ((max_bin * BLOCK_WIDTH) > (IMAGE_WIDTH - TEXT_WIDTH)){
+            number_of_blocks = ((IMAGE_WIDTH - TEXT_WIDTH)/10) * (static_cast<double>(bin) / max_bin);
+        }
+        const double bin_width = BLOCK_WIDTH * number_of_blocks;
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "black", colors[color]);
+        if (border < bin_count - 1){
+            top += BIN_HEIGHT;
+            svg_text(TEXT_LEFT / 2, top + TEXT_BASELINE , to_string(borders[border]));
+            border += 1;
+            top += BIN_HEIGHT;
+        }
+        color += 1;
+        if (color > 6){
+            color = 0;
+        }
+    }
+    svg_end();
+}