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This might be totally useless, but I wanted to join the league of people who use the Google chart API and the data dump to create pretty pictures.

So I took a look at the relative sizes of the "communities" on the site, i.e. the numbers of users who are active in certain tags, and also how much the communities overlap. A user is considered a member of a tag's community if they have at least three questions or answers in the tag. Quality (i.e. post scores) doesn't count; this is solely about the number of users.

Examples:

what's with pyqt? the center is where the flame wars start so, what exactly is the performance of a secure sql-server? this is from the April datadump -- there'll be more unicorns in May

Thoughts? Any three-combinations you'd like to see?


"The three C's" as per Koper's request and the three ancients for Pollyanna:

it's just a letter yep, it's not a lot


You can see additional graphs as requested by other users below. Note that this is several years old (and I have long stopped updating this).

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4  
The three C's: [C#, c++, c] –  Andreas Bonini Jan 22 '10 at 12:17
21  
How about C# vs. Java and Objective C? –  alex Jan 22 '10 at 14:00
21  
Not a single person knows fortran lisp and cobol?! –  Sam152 Jan 22 '10 at 15:58
3  
No single user has submitted an answer in all three tags. Given the rarity of such questions, I suspect it's more an issue of timing when they are around rather than no user exists on SO that couldn't answer all three. However, you can fix this - go answer one of each of the questions, and ask him to re-run his graph on the next data dump... –  Adam Davis Jan 22 '10 at 17:10
1  
I agree, Objective-C would be nice to see in the same graph as the Three Big C's. (Can the script not do 4?) It would be humbling, kind of like stepping into the Ultimate Perspective Vortex... ;-) –  Quinn Taylor Jan 22 '10 at 22:59
1  
"@Quinn: The script will do 4 without a problem, but the google chart API won't." I b believe it goes deeper than that: that generally you can only do N+1 sets in a N dimensional representation. Have to think about it. –  dmckee Feb 4 '10 at 22:20
3  
@dmckee: Even deeper than that. In general, you can do more, but only if you use other shapes than circles (see the canonical en.wikipedia.org/wiki/Venn_diagram for example pictures). Staying with circles, you can actually only do two in general. Look at chart.apis.google.com/… -- every adult is either male or female, but this is impossible to show with circles. Google does its best, but for these corner cases, it has to fail. –  balpha Feb 5 '10 at 6:45

41 Answers 41

[C++] vs. [Java] vs. [language-agnostic]


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Databases:

  • MySQL
  • PostgreSQL
  • Oracle

Webservers:

  • Apache
  • IIS
  • lighthttpd

Python implementations:

  • Python
  • IronPython
  • Jython

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Do you have any way to show the overlap of users between the StackExchange Sites? I think it would be interesting to see these charts comparing SO, SO Meta, SU, and SF

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  • career-development vs project-management vs best-practices on SO
  • virtualbox vs vmware.* vs .*kvm on SF
  • vim | vi vs emacs.* vs notepad++ on SU
  • retagging vs editing vs moderation on MSO

Pretty please?


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PHP, MySQL, WinForms

We'll see if a prospective employer will go crazy looking for someone with all of these skills.

Edit: I now have a good argument to apply! Thanks.


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Java Implementation

netbeans, eclipse, intellij

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CPU architecture

  • ARM
  • X86
  • MIPS
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You probably now have better ways to spend your time but...

  • StackOverflow, Programmers and Theoretical Computer Science
  • SuperUser, AskUbuntu and Unix
  • Board and Card Games, Role Playing Games and Gaming
  • Maths, Stats and Tex
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Why only three?

I would like to see the top 10 on the TIOBE index That's:

  • Java
  • C
  • C++
  • PHP
  • (Visual) Basic
  • C#
  • Python
  • Perl
  • Objective-C
  • Delphi
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6  
Okay, you go ahead and teach google (and the universe) to display 10-set venn diagrams; I'll do the rest :) –  balpha Jun 9 '10 at 19:59

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