zjonsson

7 ms·

31.
by zjonsson 13y ago
There is a link to the source at the bottom of the page ( http://www.straeto.is/rauntimakort/ ). I parse the JSON input, associate the records with previous ones (i.e. which bus is uniquely which) and stream output via
32.
Realtime Reykjavik Traffic (speed & heading) using D3, Leaflet and socket.io(traffix.jitsu.com)
3 points by zjonsson 13y ago|2 comments
33.
by zjonsson 13y ago
Page 80 onward
34.
"Hóp" New York settled in 1008 AD (Viking sagas)(rafhladan.is)
1 points by zjonsson 13y ago|1 comments
35.
by zjonsson 13y ago
For continuous known functions we would look at the mathematical derivative (using stochastic calculus). For sparse sample data with an unknown derivative, we resort to calculating differences between consecutive numbers.
36.
by zjonsson 13y ago
This analysis is interesting, however I have to comments on the methodology: * Same measure Comparing USD/INDEX with BIT/USD is a little bit like comparing apples and oranges, as the underlying measure for each of the time-series
37.
Show HN: Metro North train activity using websockets(metronorth.jit.su)
2 points by zjonsson 13y ago|0 comments
38.
Icelandic Law - Network Analysis with d3.js(zjonsson.github.com)
1 points by zjonsson 14y ago|0 comments
39.
by zjonsson 14y ago
Not only that, regular algebraic operations also work with vectors/matrices as inputs, as long as you press CTRL-SHIFT-ENTER after editing. This means that most functions with complex MATCH and OFFSET can be replaced as well (i.e. SUM( (co
40.
by zjonsson 14y ago
Matrix functions and named ranges are the most underused functionality of Excel. Collectively they can replace a large amount of the conventional spagetti VBA code, emphasizing Excel's true strength. Simple example: CDO pricer using Gaussi
41.
by zjonsson 14y ago
D3 is an excellent tool for managing a large array of SVG objects. Connecting it to leaflet is easy, just call function _initPathRoot() on the leaflet map object, followed by d3.select("#map").select("svg"). Then you can use map.latLngTo
42.
by zjonsson 14y ago
A great idea, however the web workers would have to be semi-persistent as the initial build of the crossfilter object takes some time (i.e. I wouldn't spawn a new worker on a new request). Here I simply increased the heroku nodes to respo
43.
by zjonsson 14y ago
Thanks for the comments, I copied to github for cleaner access to the source. Let me know if this is helpful: https://github.com/ZJONSSON/icequake.herokuapp.com
44.
by zjonsson 14y ago
Server-side crossfilter, eliminating the need to download the full dataset to the browser ( https://github.com/ZJONSSON/crossfilter ). Maps from LMI.is, which just released it's geographic data free of charge ( http://www.lmi.is/stafraen-ko
45.
Show HN: Earthquakes on Leaflet, Crossfilter and D3(icequake.herokuapp.com)
22 points by zjonsson 14y ago|7 comments
46.
by zjonsson 14y ago
This is fantastic Mike! Thank you.
47.
by zjonsson 14y ago
This script got me an 8GB phone just now (took 10 minutes). Simply paste into your console window (hit F12 and then ESC) setInterval( function() { var buttons = document.getElementsByClassName( 'buy-button-price' ); for ( var i = 0; i
48.
Server-side Crossfilter on node.js(flights-ajax.herokuapp.com)
1 points by zjonsson 14y ago|0 comments