https://gist.github.com/4544529 (demo) was my first d3 adventure, where I scraped signatures from a White House petition and showed them as a pie chart.

Here, I show them as a US heat map (based on one of Mike Bostock's map demos). You can click on a state, and see how many signatures came from it.

Darker color means more signatures, but since the numbers range from a few dozens to >4500, the scale is logarithmic. I don't know yet how to use log() interpolators (I promise to learn), so I just did it quick and dirty with linear() and masking tape.

forked from <a href='http://bl.ocks.org/thedod/'>thedod</a>'s block: <a href='http://bl.ocks.org/thedod/4548858'>Clickable US heat-map of petition signature count</a>

forked from <a href='http://bl.ocks.org/Craftbd/'>Craftbd</a>'s block: <a href='http://bl.ocks.org/Craftbd/7af9830ee360cf7103e0f71571d8cfb8'>Group Project Bioinformatics</a>

forked from <a href='http://bl.ocks.org/rubin2ma/'>rubin2ma</a>'s block: <a href='http://bl.ocks.org/rubin2ma/eca7ad72e037a2b879582c3c509350e8'>Group Project Bioinformatics</a>

forked from <a href='http://bl.ocks.org/Craftbd/'>Craftbd</a>'s block: <a href='http://bl.ocks.org/Craftbd/e31ca1eede63f6e51ccaaa3a098d7717'>Group Project Bioinformaticsnew</a>

forked from <a href='http://bl.ocks.org/rubin2ma/'>rubin2ma</a>'s block: <a href='http://bl.ocks.org/rubin2ma/54cad4b4040d20f090212869453e6212'>Group Project Bioinformaticsnew3</a>