Exploring Data - Data Science at the Command Line - page 107

Make sure that you have access to the port (8000, in this case). If you save the PNG
image to the directory from which the web server was launched, then you can access
the image from your browser at http://localhost:8000/ile.png .
Histograms
Using Rio ( Figure 7-3 ):
$ < data/tips.csv Rio -ge 'g+geom_histogram(aes(bill))' | display
Figure 7-3. Histogram