Articles by jackman

ideal point graphics, via d3

July 30, 2014 | jackman

I’ve updated some of the graphical displays of the ideal point estimates I serve up here. I’ve rendered some of these in d3, with some rollover lah-de-dah: (1) 113th House ideal points in a long “caterpillar” format; (2) scatterplot of ideal point against Obama 2012 vote in district. Screenshot of the ... [Read more...]

my 1st post for the Guardian Australia

May 30, 2013 | jackman

I’ll be contributing a piece about once a week for the Guardian Australia, under a part of the web site we’re calling The Swing. The set of graphs from my 1st effort were rendered in-line and rather low-res. Bigger, full res versions appear below; click on the in-line ... [Read more...]

CRAN might get tenure at Yale?

August 24, 2012 | jackman

From one of the R lists I follow: Today (2012-08-23) on CRAN [1]: “Currently, the CRAN package repository features 4001 available packages.” These packages are maintained by approximately 2350 different folks. Previous milestones: 2011-05-12: 3,000 packages [1] 2009-10-04: 2,000 packages [2] 2007-04-12: 1,000 packages [3] 2004-10-01: 500 packages [4] 2003-04-01: 250 packages [4] [1] http://cran.r-project.org/... [Read more...]

pscl 1.04 live on CRAN

October 15, 2011 | jackman

Update to my pscl package, now on CRAN. Biggest change: fixing a bug in the way MCMC draws for item parameters were being stored and summarized by ideal. [Read more...]

roll calls, ideal points, 112th Congress

June 29, 2011 | jackman

Now that classes are over, I took a little time to update my scripts that update the analysis of Congressional roll calls in close to real time.   Links appear at the top of the blog.   As of about 15 minutes ago, we’re up to 77 non-unanimous roll calls in the 112th ... [Read more...]

Sweave source for poll report

June 13, 2011 | jackman

Sweave source for the poll report for those who expressed some interest. You’ll also need this file of R function definitions, utilities.R. I also wrote a little shell script that calls Sweave and xelatex etc, hacking the Sweave.sh script that ships with R. [Read more...]

Australians and Americans, 10 years after 9/11

June 2, 2011 | jackman

With Lynn Vavreck at UCLA, I ran parallel public opinion surveys in Australia and the United States, measuring attitudes on security, the fight against terrorism, the wars in Afghanistan etc, some 10 years after the 9/11 attacks. Full report here (gene... [Read more...]

iPhone geo-tracking database

April 20, 2011 | jackman

So the web lit up a little today with news that iPhones are collecting time-stamped location data, and in a form that isn’t particularly hard to look at (and even with some nice apps to make animated maps of your travels etc): The database is SQLite, and I used ... [Read more...]

Aquamacs customizations (auctex, ESS)

October 23, 2010 | jackman

I gave an informal talk on my Mac based “workflow” at Stanford on Friday.  I talked a lot about Aquamacs as a tool for editing LaTeX (I use MacTeX) and for working with R (thanks auctex and ess, respectively).  Skim also got a mention; I emphasized TeX-PDF synchronization. Some of ... [Read more...]

R wanted for an intern at Barron’s

October 13, 2010 | jackman

R/SQL/scripting, oodles of data, a willing outlet for write-ups. Any takers? Do some good. Intern at Barron’s, the New York financial publication with a decades-long tradition of investigative journalism and a more recent commitment to data analytic exposure of fraud in finance, business and healthcare. Bring us ... [Read more...]

How fast is JAGS?

October 6, 2010 | jackman

From Martyn Plummer, on the JAGS news blog. Key graph below, showing a few outlying cases in which JAGS is substantially slower than OpenBUGS, but generally, JAGS performs quite favorably. Key point from Martyn: Incidentally, these figures are for JAGS with the glm module loaded. The glm module is not ...
[Read more...]

the spatial concentration of Green support

September 13, 2010 | jackman

I did some poking and prodding of the polling place data, looking at the way Green support is highly concentrated in the inner-capital cities (and in Melbourne and Sydney, in particular). There are a few interesting exceptions that will make sense to... [Read more...]

mapping the Australian election (2010 edition)

September 11, 2010 | jackman

The AEC makes this reasonably easy, as do the authors of some very helpful R packages, the good people at Google Maps etc. Full description here (PDF); entire collection here; a sample here, showing Green 1st preferences, by polling places across metro...
[Read more...]

Labor vote share across different types of balloting

August 26, 2010 | jackman

We’re starting to get more divisions reporting two-candidate preferred numbers by vote type. The emerging picture (literally) is one in which Labor’s performance on the pre-polls and postals is lagging its performance in ordinary votes. On the other hand, Labor seems to be doing well among absentee voters (...
[Read more...]

informality, the 2010 edition

August 24, 2010 | jackman

For the last two cycles I’ve done some simple regression analysis of the informal vote.  I saw Possum have his go at it, using a specification that is virtually the same as what I’ve run in the past (2007, 2004). The 2010 edition follows.  As usual, electorate-level informality in House of ... [Read more...]

swing graph

August 21, 2010 | jackman

I’m updating a swing dotplot PDF every 10 minutes as the count progresses (and the cool part is that the updates continue even as I’m flying Heathrow to SFO). [Read more...]
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