Hello,

I want to build a simple treemap without hierachies. The treemap must show how many faults a user made in a learning programme. There could be for example five users and they made this faults: 10, 3, 4, 1, 7. So the biggest rectangle is for the user with 10 faults.

Now I found the code of another treemap in the book "Visualizing Data" from Ben Fry. And I asked myself, if I can use this one to solve my problem. The other problem is, I´m a beginner in Processing and I don´t know how to go on.

The code from Ben Fry is like this:


import treemap.*;

Treemap map;

void setup()
{
  size (500, 500);
 
  smooth();
  strokeWeight(0.25f);
  PFont font = createFont("Serif", 13);
  textFont(font);
 
  WordMap mapData = new WordMap();
 
  String[] lines = loadStrings("equator.txt");
  for(int i=0; i<lines.length; i++)
  {
    mapData.addWord(lines[i]);
  }
  mapData.finishAdd();
 
  map = new Treemap(mapData, 0, 0, width, height);
 
  noLoop();
}

void draw()
{
  background(255);
  map.draw();
}

class WordItem extends SimpleMapItem
{
  String word;
 
  WordItem(String word)
  {
    this.word = word;
  }
  void draw()
  {
    fill(255);
    rect(x, y, w, h);
   
    fill(0);
    if(w>textWidth(word)+6)
    {
      if(h>textAscent()+6)
      {
        textAlign(CENTER, CENTER);
        text(word, x+w/2, y+h/2);
      }
    }
  }
}

class WordMap extends SimpleMapModel
{
  HashMap words;
 
  WordMap()
  {
    words = new HashMap();
  }
 
  void addWord(String word)
  {
    WordItem item = (WordItem) words.get(word);
    if (item == null)
    {
      item = new WordItem(word);
      words.put(word, item);
    }
    item.incrementSize();
  }
 
  void finishAdd()
  {
    items = new WordItem[words.size()];
    words.values().toArray(items);
  }
}


The library could be downloaded from http://benfry.com/writing/treemap/library.zip
The data file can be found here http://benfry.com/writing/treemap/equator.txt


Is it possible to use this code to solve my problem? How can I go on?
Could anybody help me? Thanks so much!