When working with analytics, in whatever flavor, one of the key things you need is some data. But data comes in many different shapes and sizes, but where can you get some useful data, be it transactional, time-series, meta-data, analytical, master, categorical, numeric, regression, clustering, etc.
Many of the popular analytics languages have some data sets built into them. For example the R language comes pre-loaded with data sets and these can be accessed using
but many of the R packages also come with data sets.
Similarly if you are using Python, it comes with some pre-loaded data sets and similarly many of the Python libraries have data sets build into them. For example scikit learn.
from sklearn import datasets
But where else can you get data sets. There are lots and lots of website available with data sets and the list could be very long. The following is a list of, what I consider, the websites with the best data sets.