Evan Savage

datafist: Exploration And Analysis

In this post I introduce datafist, an in-browser tool for visually exploring
your data.

First, A Quote #

Are we analyzing data? Then we should be manipulating the data themselves; or if we are designing an analysis of data, we should be manipulating the analytic structures themselves.

The Sixfold Path Of Self-Tracking #

Self-tracking is a complex process. It can be broken down into stages:

Thanks to smartphones and cheap sensors, many of us already have the tools
necessary for measurement. The psychology of intent and action is rapidly
being explored through Habit Design and Captology, with
startups like Lift and Beeminder harnessing the findings
to great effect.

What are the technologies of analysis and interpretation?

Visualization #

Visualizations, even interactive ones, are usually designed to answer
specific questions
such as how did Obama win re-election?
Within the context of those questions, they help us understand our data
intuitively. Outside that context, however, they are often useless.

Statistical/Mathematical Software #

Environments like R and Mathematica allow you to explore
your data in meticulous detail.
In the hands of people like
Stephen Wolfram, they are the holy grail of data analysis. For the
less technically inclined, they remain hopelessly unintuitive.

A Middle Road #

What we need is something between the two, a hybrid that exposes the
exploratory power of the latter through the intuitive interface of the former.
Such a tool would give us the opportunity to explore our data as we see fit.
We could ask our data questions, iterating quickly on those questions until
we reach useful insights.

Until we can all converse with our data with the fluency of Hans Rosling,
there's still room for improvement!

datafist #

datafist tries to bridge this gap by providing visual and gestural actions
for data manipulation. This is probably easier to demonstrate than describe,
so here's a screencast that shows an early development version of datafist
in action:

As you use datafist, you're constantly modifying the analysis itself.
This modification takes place through visual and gestural actions: you
move channels to the viewer, drag out ranges of time to zoom in on, and draw
regions around interesting clusters. As you do this, the view is
updated in real-time, allowing you to see the effects of your actions.

Try datafist Out! #

I'm hosting a version of datafist here at savageevan.com.
Note that this is still a very early development version!

Contribute to datafist! #

If you're interested in making datafist better, fork me on github!
Bug reports should be submitted via the issue tracker.
In particular, if you have a CSV file that won't import properly, please attach
it for testing purposes!

Inspiration #