Any unspecified fields for new structs in the array contain empty arrays.
patient(3).name = 'New Name';
patient(3)
ans = struct with fields:
name: 'New Name'
billing: []
test: []
Access data in the structure array to find how much the first patient owes, and to create a
bar graph of his test results.
amount_due = patient(1).billing
amount_due = 127
bar(patient(1).test)
title(['Test Results for ', patient(1).name])
11 Structures