tungwaiyip.info

home

about me

links

Blog

< February 2010 >
SuMoTuWeThFrSa
  1 2 3 4 5 6
7 8 910111213
14151617181920
21222324252627
28      

past articles »

Click for San Francisco, California Forecast

San Francisco, USA

 

Visualization Using Variable Width Bar Chart

I was plotting a chart to visualize various development project in my area. The primary concern is in development density. But the project footprint itself is also a factor. We want to focus on big project that matters. We also want to identify outliers that has very high or very low density, but otherwise has small overall size and less relevance.

My solution is to use a variable with bar chart below. The height of each bar represents the density. The width represents the lot size. The area of each rectangle bar reflects the total number of units. The full article is posted in Potrero Boosters Neighborhood Association's website.

potrero condo density

I thought everything that worth inventing has been invented. So I was frustrated that I cannot find a tool to generate this chart. Nothing in Excel (that I know) can generate a chart like this. I end up turning to matplotlib. But even matplotlib does not seem to have a function that support this directly. Fortunately a small twist to its histogram function does the job for me. See my (unpolished) source code here. In any case working with matplotlib is fun and the quality of the chart is excellent.

2010.02.26 [, ] - comments

 

 

blog comments powered by Disqus

past articles »

 

BBC News

 

Brexit: Cabinet considering ramping up no-deal plans (18 Dec 2018)

 

Yemen war: Ceasefire takes effect in Hudaydah after skirmishes (18 Dec 2018)

 

Jose Mourinho: Manchester United sack manager (18 Dec 2018)

 

Gently stroking babies 'provides pain relief' (18 Dec 2018)

 

China 'will not seek to dominate' (18 Dec 2018)

 

Women shave their heads to protest lawyer's detention in China (18 Dec 2018)

 

Russian cargo ship runs aground off Cornwall coast (18 Dec 2018)

 

El Salvador court frees woman jailed under anti-abortion laws (18 Dec 2018)

 

Two Scandinavian women tourists found dead in Morocco (18 Dec 2018)

 

Former CBS boss Les Moonves denied exit pay (18 Dec 2018)

more »

 

SF Gate

 

For retailers, smartphone is the future of store expierience (17 Dec 2018)

 

Ship traffic, December 18 (17 Dec 2018)

 

Equifax failed to match security to its growth, report says (16 Dec 2018)

 

Hertz teams up with Clear to speed rentals with biometric scans (16 Dec 2018)

 

Analysis: Is tech too easy to use? (16 Dec 2018)

 

San Franciscans Googled some weird stuff in 2018 (15 Dec 2018)

more »


Site feed Updated: 2018-Dec-18 03:00