// the frequencies as collected during the in class survey
String[] month;
int[] numBirthdays;


void setup() {

  // Read data from file, populate the data arrays
  String[] lines = loadStrings("birthdays.txt");
  for (String s : lines) {
    println(s);
  }
  // create data arrays to store the data present in lines
  month = new String[lines.length];
  numBirthdays = new int[lines.length];
  
  for (int i = 0; i < lines.length; i++) {
    // split line into its pieces
    String[] pieces = split(lines[i], ",");
    month[i] = pieces[0];
    numBirthdays[i] = int(pieces[1]);   
  }
  
  println("There were " + numBirthdays.length + " entries.");
  for (int n : numBirthdays) {
    println(n);
  }
  
  // Sketch set up...
  size(800, 400);
  //size(displayWidth, displayHeight);
  smooth();
  background(#D8D4D4);
  noLoop();
} // setup()

void drawBarGraph(int[] data, String[] labels) {
  // set up plot variables
  float x = 0.05*width;
  float plotW = 0.9*width;
  float y = 0.80*height;
  float plotH = 0.75*height;
  float delta = plotW/numBirthdays.length;
  float w = delta/2;
  int lo = 0;
  int hi = max(numBirthdays);

  for (int i = 0; i < data.length; i++) {
    float h = map(data[i], lo, hi, 0, plotH);
    fill(#AA21B4);
    rect(x+i*delta, y-h, w, h);

    // Draw the labels below
    pushMatrix();
    fill(0);

    translate(x+i*delta, y+20);
    rotate(radians(45));

    text(labels[i], 0, 0);
    popMatrix();
  }
} // drawBarGraph()

void draw() {

  // Draw a bar graph
  drawBarGraph(numBirthdays, month);
} // draw()