Averaging

// Oliver Haimson 

// Assignment 08C

// Copyright 2012

​

float scores[] = {

  21.43, 50.00, 59.52, 65.48, 71.43, 71.43, 82.74, 85.71,

  85.71, 85.71, 91.67, 92.86, 93.45, 94.64, 96.43, 98.81,

  102.98, 103.57, 104.17};

void setup() {

  size(620, 400);

  smooth();

  background(255);

  float sum = 0;

  noStroke();

  fill(25,150,200);

  // draw rectangles

  for (int i=0; i<scores.length; i++){

    rect(40+i*30, height-30-scores[i]*3, 20, scores[i]*3);

    sum+=scores[i];

  }

  float avg = sum/scores.length;

  // the average value is 81.986

  strokeWeight(2);

  stroke(200,50,25);

  fill(200,50,25);

  line(35, height-30-avg*3, width-20, height-30-avg*3);

  text("mean: "+nf(avg,2,2), 40,height-35-avg*3);

  fill(0);

  textSize(10);

  stroke(0);

  strokeWeight(1);

  textAlign(CENTER);

  // y axis

  line(35,height-30, 35,height-30-100*3);

  for (int n=0; n<max(scores); n+=20) {

    text(n, 20, height-30-(n*3-4));

    line(29, height-30-n*3, 35, height-30-n*3);

  }

  // title

  textSize(30);

  text("Exam Scores", width/2, 35);

}