This Gist has a couple of things going on, I’ll just list them:

- It downloads the entire history of U.S. House DW-NOMINATE scores from voteview.com
- It evaluates aggregate statistics, with members grouped by party and congress, with easy weighted functions from Hmisc.
- It does the aggregating and data.frame conversion all in one very easy step, using plyr. I have always done this type of aggregation in other ways (by(), *apply(), etc.), but plyr sure made it easy.
- It makes a really pretty nice plot of the distribution of first-dimension ideological ideal points, by party, over time.

*Related*

To

**leave a comment** for the author, please follow the link and comment on their blog:

** is.R()**.

R-bloggers.com offers

**daily e-mail updates** about

R news and

tutorials on topics such as:

Data science,

Big Data, R jobs, visualization (

ggplot2,

Boxplots,

maps,

animation), programming (

RStudio,

Sweave,

LaTeX,

SQL,

Eclipse,

git,

hadoop,

Web Scraping) statistics (

regression,

PCA,

time series,

trading) and more...

If you got this far, why not

__subscribe for updates__ from the site? Choose your flavor:

e-mail,

twitter,

RSS, or

facebook...

**Tags:** foreign, ggplot2, graphics, Hmisc, plyr, rstats