With respect to multinomial logit model, the performance difference between the two packages are quite large, based on this post.
Posts Tagged ‘ Stata ’
GEE using Stata vs. R
I am running GEE logistic regression model for my fetal loss paper. As usual, I compare results between Stata and R and make sure they are consistent. To my surprise, the models assuming independent correlation structure give similar results but the mo...
Google maps and travel times
Travel times and trip distances are at the core of urban economics. Many models of competition, housing markets, etc., rely on travel times or distances to explain the variance in economic outcomes. Determining travel times, especially non free-flow tr...
Regular expressions, an example
Why regular expressions are your friend. This is written in Stata but applies to any language where regular expressions exist.Original version if length("`qx'")==3 { ...
Tab completion
Let's say your hands are aching from too much typing in of variables. What to do? Get a keyboard tray and learn proper ergonomics, of course.But what if you just want to reduce the amount of typing in of variables you do for reasons of laziness...err...
Post-estimation results manipulation: Stata vs. R
Stata's new "margins" command is as powerful as "Zelig" package for R for the purpose of conducting post-estimation manipulation of the results (e.g. producing predicted probabilities, confidence intervals, etc.). While "margins" uses delta method, "Ze...
STATA: Regular expressions
A regular expression allows you to do a moderately fancy search (and replace if you want). So say you wanted to replace all the "Dennis"s in a variable with "Awesome"s, but only if they're at the end of the line. You could try:-replace PBFnamevar = r...
Example 7.39: Nelson-Aalen estimate of cumulative hazard
In our previous example, we demonstrated how to calculate the Kaplan-Meier estimate of the survival function for time to event data. A related quantity is the Nelson-Aalen estimate of cumulative hazard. In addition to summarizing the hazard incurred ...
What Social Network Analysis software do you use?
See a the poll here by Gabriel Rossman at Code and Culture. I voted for R and ‘igraph’. If you use R you are getting access to all the other wonderful things that come with R. Using specialized package, like Pajek, UCINET etc requires constant going back and forth between network software and some...
An article attacking R gets responses from the R blogosphere – some reflections
In this post I reflect on the current state of the R blogosphere, and share my hopes for the future
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
