Notice that towards the end of the page you see a totals row followed by rows with other summary statistics. Create an object called tail_index with the index of the totals entry. Because our PDF page...

Notice that towards the end of the page you see a totals row followed by rows with other summary statistics. Create an object called tail_index with the index of the totals entry.

Because our PDF page includes graphs with numbers, some of our rows have just one number (from the y-axis of the plot). Use the str_count function to create an object n with the number of numbers in each each row. Hint: you can write a regex for number like this \\d+.