Create new variable based on other variables

[Erik Kalfus]

I have a data set on gross income and I'm trying to display the percent of total gross income (in a pie chart) that comes from 1. wage income 2. interest/dividend income and then 3. other income (Business and farm income, ss income, etc.).

How do I create a new variable that is the sum of all of the 'other' variables. Basically, I want a pie Chart that Shows percent of total gross income that Comes from
1. wages
2. interest and dividend
3. other

Thanks!

[Nick Cox]

gen total = wages + interest_and_dividend + other

But you don't need an explicit total variable. Try this:

clear
set obs 1
gen a = 1
gen b = 2
gen c = 3
graph pie a b c