// Drawing a Pie Chart of BMC Science Majors
// The data...
int[] nMajors;
String[] majors;
   
void setup() {
   size(900, 600);
   background(255);
   textSize(12);
   noLoop();
   
   // Read data from data file into data arrays
   // Read the data file into lines[]
   String[] lines = loadStrings("SciMajors.txt");
   for (String line : lines) {
      println(line);
   }
   println("There were " + lines.length + " data items.");
   
   // Crate the data arrays
   majors = new String[lines.length];
   nMajors = new int[lines.length];
   
   // Parse the data in lines into the data arrays
   // Parse the lines into data arrays
   for (int i=0; i < lines.length; i++) {
      // Parse the ith line into data
      String[] pieces = split(lines[i], ",");
      majors[i] = pieces[0];
      nMajors[i] = int(pieces[1]);
   }
} // setup()

void draw() {
   
   float minX = width*0.05;
   float maxX = width*0.95;
   float minY = height*0.05;
   float maxY = height*0.95;
   float N = nMajors.length;
   float barSpace = (maxX - minX)/N;
   float barW = barSpace*0.8;
   
   // Draw the graph
   float x = minX;
   noFill();
   beginShape();
   for (int i = 0; i < N; i++) {
      // Plot the ith data bar
      float h = map(nMajors[i], 0, 100, 0, maxY-minY);
      float y = maxY - h;
   
      vertex(x, y);
      x = x + barSpace;
   }
   endShape();
} // draw()