Clojure for Data Science

Load and inspect the data

In the previous chapter, we used Incanter to load Excel spreadsheets with the incanter.excel/load-xls function. In this chapter, we will load a dataset from a tab-separated text file. For this, we'll make use of incanter.io/read-dataset that expects to receive either a URL object or a file path represented as a string.

The file has been helpfully reformatted by AcmeContent's web team to contain just two columns—the date of the request and the dwell time in seconds. There are column headings in the first row, so we pass :header true to read-dataset:

(defn load-data [file]
  (-> (io/resource file)
      (iio/read-dataset :header true :delim \tab)))

(defn ex-2-1 []
  (-> (load-data "dwell-times.tsv")
      (i/view)))

If you run this code (either ...