R Programming By Example

Simplifying assumptions

We can complicate the example as much as we want, but to keep the simulation simple (although not trivial), we are going to assume a couple of things upfront. First, we assume that each sale record contains a single type of food. If a person buys two or more different types of foods, then each of those types will produce a different sale record. However, each sale can contain as many portions of the foods as we want, as long as they are the same type (combination of macronutrients and protein sources). This is the most important simplification, since company sales orders normally have various items per sale, but it will allow us to focus on the programming side of things.

Second, we will not worry about the relation ...