The functionality described in this post was inspired by conversations I had with @izahn and @vincentarelbundock over on the Zelig GitHub Issues page. The complete feature set will be available from Zelig 5.0–16.
We released Zelig version 5.0–17 to CRAN the other day. There are lots of updates that make working with nonlinear covariate transformations, imputations, and counterfactuals much easier. Here are…
This post refers to Zelig version 5.0-13
In a previous post I discussed the goal to improve Zelig’s tests. A related goal that I’m also focusing on is improve Zelig’s documentation. Clear documentation enables:
This post refers to Zelig version 5.0–13
One of Zelig’s main selling points is that it provides a common syntax for estimating models from a wide range of R packages. This is also one of its key software maintenance challenges.
Zelig has had a hard time with unordered factor-level independent variables recently. From 5.0–13 setx just didn’t work with factors at all, e.g.:
library(Zelig)z.out <- zelig(Petal.Width ~ Petal.Length + Species, data = iris, model = "ls")x.out <- setx(z…
Zelig version 5.1–1 is now available for download from CRAN!
A new version of Zelig (5.1–2) is now available for download from CRAN. This release includes a lot of documentation and stability improvements. For example, setx and sim now fail informatively for ZeligEI models (these aren’t…
Starting from about 14% code coverage in Zelig 5.0–13, and due in no small part to lots of work by James Honaker, Zelig will have over 83% code coverage in version 5.0–15:
Last week (9 January 2017) I started working as a research associate at IQSS, Harvard University. I’m initially tasked with maintaining and expanding the Zelig R package.
Zelig is an ambitious package. It has the goal to be “Everyone’s Statistical…
The title explains it all. Many of these are taken from with slight modifications from The Unix Philosophy.