I'm relatively new to treemaps (and processing for that matter) and have read through Ben Fry's
Visualising Data Chapter 7 and still don't quite understand how to integrate it into my own code.
What my goal is:
I'm trying to create a treemap visualisation of the frequency of each tempo of each song released on Beatport over a date range (in this case 1 month).
What I have so far:
Download the code here. (includes libraries and the .CSV data file, so you don't need to worry about the one that will print out.)
Fetching JSON data using Beatport's API and extracting 'bpm' and 'datePublished' information.
Writing this data to a CSV file.
What I need help with:
I need to sort my data in a way that frequency of 'bpm' values are counted for each unique date. For example:
Date 1 e.g. 01/01/01 Frequency of each bpm that was released on that date: 127: 10 122: 20
Date 2 e.g. 02/01/01 Frequency of each bpm that was released on that date: 127: 15 122: 10
So, for the date range 1st Jan 2001-2nd Jan 2001, bpm 127 occurred 25 times, while 122 occurred 30 times.
It is this data I want to visualise for each 'bpm' on a treemap.
From what I've read I think I may need to implement a treemap within a treemap? Any help would be very much appreciated!
