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Category Archives: R statistics
Stata tip: Doing something conditional on existence of a variable in the dataset, using a local
In a program I am writing I want the same utility file to be run on different datasets and certain variables in the dataset. But the datasets have different sets of variables. So a nice Stata tip, adapted for my … Continue reading
Posted in R statistics
What students learning R in Econ 4142 can aspire to…
The ideal job for every Econ major! You can follow Levin on Twitter here. Matt Levin is the data dude for CALmatters. His work entails distilling complex policy topics into easily digestible charts and graphs, finding and writing original stories … Continue reading
Posted in R statistics
Is there a good way to download the coordinates of a path or route on google map into a file?
The folks at stackoverflow just dismissed this question. But is an honest and useful question to have answered, for some applications. And here is a good ttip from fentonsrule: This is something I learned on my own. If you create … Continue reading
Posted in R statistics
The perfect graph for every undergraduate statistics class, from Financial Times
I object to usage of “trend” to indicate “relationship” (for me “trend” implies over time) but that is just a quibble. Perfect illustration of importance of visualizing data. PS. Doug Campbell reminded me of importance of a title for the … Continue reading
Posted in Development thinking, R statistics
Reading in PDF files into R to do text analysis
Turns out Clay Ford at the University of Virginia wrote a nice tutorial for this, and a package does the trick very nicely. I tested the “update” at the bottom of the post which shows how to use the pdftools … Continue reading
Posted in R statistics
Stata gets a markdown package… will try this in coming weeks
Rigorous documentation of the analysis plan, procedure, and computer codes enhances the comprehensibility and transparency of data analysis. Documentation is particularly critical when the codes and data are meant to be publicly shared and examined by the scientific community to … Continue reading
Posted in R statistics
Noncitizens voting? Wonderful straightforward analysis from Ansolabehere, Luks, and Schaffner
Stepping back from the immediate question of whether the CCES in fact shows a low rate of voting among noncitizens, our analysis carries a much broader lesson and caution about the analysis of big databases to study low frequency characteristics … Continue reading
Posted in R statistics