I'm looking for an aggregate data set which shows three datasets of related data, and a percentage share for each over time. So for example, it might show manufacturers share over time for each of 3 categories of product. I want the shares to total 100% in each category. Another example might be 3 portfolios of similar stocks over time. I want this for my cross section visualization of a series of nested shells. Each axis will be a different dataset--the equivalent of an animated pie chart. From the middle to the outside will equal 100%. So 5 dimensional data.
Clarification: 5 dimensions: Time, categories (companies, for example) and 3 share dimensions, each of the 3 total 100%. The values of category are preferably the same for the 3 share dimensions (not the share values), but not necessarily.
I'm sorry if this is vague, I don't have a particular type of data in mind. At least 5 measurements in the time dimension would be nice. Something cyclical in time would be nice too. I can munge data. Would something on data.gov work? I'm basically a novice at data gathering, and would trade a visualization for data, Thus:
Once the 3D visualization is complete, I will post the visualization in source form here. Here it is as it now stands: http://coderextreme.net/earth/world.html I will animate each plane of the cross-section individually over time.