I just started using Stata, but I am wondering if it possible to create a new variable with existing data. I have monthly data from a broker for several years. I imported one month to get to know Stata better before I go on. I started to create a new excelfile with only the variables I need. With these variables I can create the performance of investors. The formula how I would use it in excel is as follows:

Performance = (x-(y-z))/(x2-y).

I tried to do this with Stata:

Code:

`gen janperformance = (x - (y - z)) / (x2 - y)`

I tried to find an answer in the FAQ on the stata website, without success. Therefore I am hoping if someone could explain if and how I can create this.