A Useful resources
A.1 Learning R and coding issues
R for Data Science - This free online book provides a good introduction for R though it differs in several important ways from this class.
Stack Overflow - Stack Overflow is a website that answers programming-related questions. It’s like the Yahoo Answers of programming. That said, a lot of the answer are bad. Some answers are overly confusing or provide code that you may not understand. You can use this source, but don’t rely too heavily on it. Its search function isn’t great so it’s better to Google your question and choose the stackoverflow.com result.
National Archive of Criminal Justice Data (NACJD) - Crime Data - NACJD is a site where you can download crime data, including many of the data sets we’ve worked on throughout this book. Nearly all FBI and BJS data sets are available on this site. If you need data for a research question, NACJD is a good place to start looking.
Inter-university Consortium for Political and Social Research (ICPSR) - General Data - Like NACJD, ICPSR allows you to download data from a variety of government and non-government sources for research. ICPSR holds a wider variety of data than NACJD does (NACJD is part of ICPSR) so includes data that is not specifically crime-related.
Crime Data Tool - cleaned crime data - This is my personal site where you can look at graphs and tables of (primarily) agency-level data including offenses, arrests, assaults on officers, and prison information. On each page you can download a .csv file with the information displayed. On the data page, there are links to all of the data sets I have cleaned and made available - this data is mostly UCR data but includes some other data such as the alcohol consumption data we explored in Chapter @ref(#graphing-intro).
Local crime data - The Police Foundation has put together a list of data sets made public by police agencies. This data is primarily data sets of crime incidents, calls for service, arrests, and officer-involved shootings though some other categories such as workforce demographics and assaults on officers are available.