A nice way to get introduced to Predictive analysis in the Data Geek Challenge !
In my example I take the Dutch weather data containing sun shine hours over the past years. Next to that I grab the number of solar spots measured on yearly basis by NASA and merge that data with my weather data. Now I can analyse the influence of sun solar spots (the well known 11 years cycle) and the dutch sun shine hours.
It shows definitely how easy it is to get insight in data from different sources and display it in a graphical way and stored in-memory !
The attachment shows how files can be selected and merged.