Wednesday, November 06, 2013

Data Visualization with D3.js Cookbook

For the last 7 months I have been working on Data Visualization with D3.js Cookbook with Packt Publishing. It has been a very interesting and educational journey for me personally. Moreover it definitely made me appreciate more about book writing and authors who just have their ways with words produced books we come to enjoy. Last week I have finally arrived at the end of this amazing journey and published this humble cookbook.

Data Visualization with D3.js Cookbook

It is now available at:

All recipes in this cookbook can be found here live online http://nickqizhu.github.io/d3-cookbook/

Thursday, August 22, 2013

dc.js v1.5 released


  • enhanced focus and zoom capability
  • overhaul stacking logic to better support different stacking styles
  • introduced legend widget 
  • various bug fixes and minor enhancements (see v1.5 issue log for details)
See updated Nasdaq example for live demo http://nickqizhu.github.io/dc.js/

Saturday, June 22, 2013

dc.js v1.4 released

dc.js v1.4 - a mutli-dimensional charting library built with crossfilter and d3 was released today. This release has some of the most long anticipated features in the backlog:

  • multi-selection filtering (initially implemented by @davidda)
  • elastic x-axis for row chart
  • mouse zoomable line/bar/composite chart (contributed by @ChaksChigurupati) 
And with various bug fixes and minor enhancements (see v1.4.0 issue log for details). Make sure to check out our updated example page to see these features in action.


Saturday, June 08, 2013

ThoughtWorks 2013 NA Away Day Notes

Yesterday I landed in beautiful Denver CO attending this year's North American ThoughtWorks Away Day held at Keystone Resort for the weekend.


For large part of today I have been inspired and challenged by brilliant sessions given by fellow thought workers and in this blog I would like to share some of my random thoughts on these topics. The following thought fragments are written as notes, not in any particular order:
  • Deliver but don't be afraid of failure 
  • Fail fast and cheaply
  • Ideally fail before delivery and in small increment
  • Focus on idea validation
  • Open to differences in idea
  • Success criteria should be defined with client not by implementer
  • Stake holder should become influencer and even implementer not just holder
  • Classic (state driven) vs. Mockist (interaction driven) unit testing
  • Unit Test, Integration Test, Component Test, End2End Test, Contract Test -> MicroService Test Strategy
  • Internal service resource to facilitate testing
  • Give contract test kit to up-steam service team so they can integrate it into their pipeline
  • Contract for the same service is different for different service consumer
  • Test brittleness goes up as you climb the pyramid 
  • Lower the cost of failure and faster we can fail the higher the anti-fragility
  • Tossing out code is better than maintaining unused feature
  • Design/Validation by elimination
  • Use "specification by example" to drive requirement
  • QA engagement early on
  • Think of QA as XD for negative path
  • XD tends to focus more on happy path
  • Path mapping: map happy/sad path for different persona to bring visibility to product and stake holders
  • Analytics (facts) driven experience design
  • Everything becomes better with example
  • Analytics - better business decision support 

Wednesday, April 17, 2013

dc.js v1.3 released

dc.js v1.3 was released with a new type of chart support - Row Chart (thanks to Leo Sun's contribution). 


Check out our updated NASDAQ example page to see it in action. On top of that in this release now dc.js also supports run-time dimension and group switch.

Saturday, March 09, 2013

dc.js v1.2 release

Just released dc.js v1.2. In this release the following enhancement and bugfixes were introduced:

  • Overhaul how Coordinate Grid chart handles negative values, and making this kind of rendering possible.


Try it out today.

Sunday, January 13, 2013

dc.js v1.1 released



Just released dc.js v1.1. In this release a few key features were introduced:

1. Capability to focus and zoom in on coordinate grid charts, see updated NASDAQ example for a live demo.
2. Ordinal scale support on bar/line chart
3. Listeners support for the following events
    • preRender
    • postRender
    • preRedraw
    • postRedraw
    • filtered
4. Many bug fixes and minor enhancement

Try it out today or check out our updated NASDAQ demo.