BFont f;
int COLS = 8;
int ROWS = 3;
int data[][] = new int[COLS][ROWS];
color[] cols = new color[ROWS];

void setup() {
  size(240,180);
  f = loadFont("Meta-Bold.vlw.gz");
  load(data);
  cols[0] = color(255,0,0);
  cols[1] = color(0,255,0);
  cols[2] = color(0,0,255);
}

void loop() {
  background(0);
  textFont(f,20);
  text("A graph of data from file: data.csv",10,30);
  graph(data);
}

void load(int[][] d) {
  String[] stuff = loadStrings("data.csv");
  //for every row in the text file
  //split the string up into integers and
  //fill 2D array
  for (int i = 0; i < stuff.length; i++) {
    int[] row = splitInts(stuff[i],',');
    for (int j = 0; j < row.length; j++) {
      d[j][i] = row[j];
    }
  }
}

void graph(int[][] d) {
  for (int i = 0; i < ROWS; i++) {
    stroke(cols[i]);
    for (int j = 0; j < COLS-1; j++) {
      int stretch = 30;
      line(j*stretch,height-d[j][i],(j+1)*stretch,height-d[j+1][i]);
    }
  }
}