In this chapter, you learned about data preprocessing in order to make it displayable for the visualization. We saw how to filter unexpected data, how to map data to a different representation, and how to aggregate data.
We took a look at loading data from remote resources and custom-parsing via Regular Expressions. We saw how to split a string into an array of elements that can then be used for further processing. In the end, you learned how to use D3 for grouping flat data into nested objects. This helped us to ultimately extract all the desired information out of the remote dataset.
In the next chapter, we will take the previously generated chart and make it responsive. You will learn what it exactly it means for a chart to be responsive and how we can use Bootstrap to achieve this.
