... concen(toxtest);% Create two vectors:% r1 contains the ratio of mercury to lead at each observation.% r2 contains the ratio of lead to chromium.r1 = [toxtest.mercury] ./ [toxtest.lead];r2 = [toxtest.lead] ... multiple ways to apply functions or operators acrossfields in a structure array. One way to add all thebillingfields in thepatientarray istotal = 0;for k = 1:length(patient)total = total + ... element(1,2)ofpatient.Adding Fields to StructuresYou can add a field to every structureinanarraybyaddingthefieldtoasingle structure. For example, to add a social security number field to thepatientarray,...