Just wanted to say that I think your Heatmap.js plugin is awesome and I've used it extensively in a school project last semester.
I have one question about it. Is there a feature to remove some data points, or perhaps keep only some max number of data points in the heatmap so that the older ones are removed as new ones stream in kind of like a queue? Or is the only way to clear points redrawing the heatmap?
I think something like this is important because it allows for seriously real time heatmaps without getting too big and slow.
Wonderful work.<p>Frankly speaking, I have some similar idea the other day, what i thought then was to collect the top news.<p>I have the habits to read HN news everyday, mostly through my smartphone. News with more comments (>100 is hot) usually get more attentions. And I will bookmark news with more than 100 or 200 comments.<p>So thank you for your nice work, it will certainly make my life more easy~
Look cool, two comments:<p>- The heatmap is sometimes off some pixels, see <a href="http://imgur.com/FyqOG" rel="nofollow">http://imgur.com/FyqOG</a><p>- It's not possible to click links any more after applying the heatmap. This basically makes it useless, as you have to refresh to page in order to click a popular link.
Nice concept, unfortunately you get some strange results if you apply it to the new page (where I think it would have a much better use): <a href="http://i.imgur.com/afSPm.jpg" rel="nofollow">http://i.imgur.com/afSPm.jpg</a><p>Is there a reason it seems to highlight at random?
Doesn't seem to work for me. I see an 500 error in the Chrome console.<p><a href="http://api.ihackernews.com/page?format=jsonp&callback=hmap.jsonp" rel="nofollow">http://api.ihackernews.com/page?format=jsonp&callback=hm...</a>
If you find this interesting, you may also like this Chrome extension:<p><a href="http://github.com/wuzhe/social-hotness" rel="nofollow">http://github.com/wuzhe/social-hotness</a>