svg.h is added

f435eb16 · saeed · 0919bbe2 · f435eb16
Commit f435eb16 authored Jan 30, 2018 by saeed
--- a/svg.h
+++ b/svg.h
+#ifndef SVG_H
+#define SVG_H
+
+void create_svg(float *y, int N){
+  
+  float xmin, xmax, ymin, ymax;
+
+  //N = 50;
+
+  xmin = 0; xmax = (float)N;
+  ymin = -0.5; ymax = 0.5;
+
+  char filename[] = "ssh.html";
+
+  int w=640, h=400; // pixel size on screen
+  
+// Add a little empty space around the plot
+   float left, right, top, bottom;
+   left   = xmin - 0.1*(xmax-xmin);
+   right  = xmax + 0.1*(xmax-xmin);
+   bottom = ymin - 0.1*(ymax-ymin);
+   top    = ymax + 0.1*(ymax-ymin);
+  
+// Begin SVG file
+   FILE *f = fopen(filename, "w");
+   fprintf(f, "<html><body><svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\"");
+   fprintf(f, " width=\"%dpx\" height=\"%dpx\"", w, h);
+   fprintf(f, " viewBox=\"%f %f %f %f\"", left, bottom, right-left, top-bottom);
+   fprintf(f, " preserveAspectRatio=\"none\">\n");
+   fprintf(f, "<g transform=\"scale(1.0 -1.0)\">\n\n");
+  
+// Create axes
+   fprintf(f, "<polyline points=\"%f,%f %f,%f\"", left, 0.0, right, 0.0);
+   fprintf(f, " style=\"fill:none;stroke:grey;stroke-width:%f\" />\n", (top-bottom)/h);
+   fprintf(f, "<polyline points=\"%f,%f %f,%f\"", 0.0, bottom, 0.0, top);
+   fprintf(f, " style=\"fill:none;stroke:grey;stroke-width:%f\" />\n\n", (right-left)/w);
+  
+// Plot data using a polyline element
+   fprintf(f, "<polyline points=\"");
+   for (int n=0; n<N ; ++n) fprintf(f, "%d,%f ", n, y[n]);
+   fprintf(f, "\" style=\"fill:none;stroke:black;stroke-width:%f\" />", (right-left)/w);
+   // Complete the HTML file
+   fprintf(f, "\n\n</g></svg></body></html>\n");
+   fclose(f);
+
+   return;
+}
+#endif /* end of SVG_H */