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

 

Kim Wall murder: Danish inventor Peter Madsen given life sentence (25 Apr 2018)

 

Iran nuclear deal: Rouhani says West has no right to make changes (25 Apr 2018)

 

Madrid leader quits amid 'cream theft' claim (25 Apr 2018)

 

India teacher arrested over wedding bomb murder (25 Apr 2018)

 

WhatsApp raises minimum age limit in EU (24 Apr 2018)

 

Mexican 'cowboy' stops armed robbery in Monterrey, Mexico (25 Apr 2018)

 

Alek Minassian Toronto van attack suspect praised 'incel' killer (25 Apr 2018)

 

Singapore mourns Inuka, the world's only 'tropical polar bear' (25 Apr 2018)

 

Man critical after Anfield attack before Liverpool-Roma clash (25 Apr 2018)

 

Asaram Bapu: Indian guru sentenced to life for raping girl (25 Apr 2018)

more »

 

SF Gate

 

Bay Area News (7 Jan 2012)

 

City Insider (11 Feb 2012)

 

Crime Scene (13 Feb 2012)

 

C.W Newius Column (10 Jan 2012)

 

C.W. Nevius Blog (11 Feb 2012)

 

Education News (10 Jan 2012)

 

KALW (11 Feb 2012)

 

Matier and Ross Blog (11 Feb 2012)

 

Overworked? These are the companies offering the best work/life balance, according to Indeed (25 Apr 2018)

 

Business News Roundup, April 25 (24 Apr 2018)

 

For the first time, Facebook spells out what it forbids (24 Apr 2018)

 

YouTube says computers are catching problem videos (24 Apr 2018)

 

Zelle money-transfer service vulnerable to hackers (24 Apr 2018)

 

Comey book sells, Yahoo fined for breach, Bezos says regulation is ‘fine’ (24 Apr 2018)

more »

 


Site feed Updated: 2018-Apr-25 07:00