STATA 11 for Windows SAMPLE SESSION - Food Security Group ...

Stata 11 Sample Session Section 2 – Restructuring Data Files – Table Lookup & Aggregation
Create a variable with the adult
equivalent for each person
The generate.... if command
The replace.... if command
this survey are:
Males, 10 years and older = 1.0
Females, 10 to 19 years old = 0.84
Females, 20 years and older = 0.72
Children, under 10 years old = 0.60
We will use the Generate.../If... command to compute
the adult equivalents for each member. We will name the
adult equivalent variable that we create as ae.
1. Select Create or change variables from the
Data menu
2. Select Create new variable
The generate - Generate a new variable dialog box
opens.
3. Under the Main tab, type the name of the new
variable in the Generate Variable box:
ae
4. For the Contents box, type the value of 1
5. Click on the if/in tab.
6. Type the statement ca4 == 1 & ca3 >= 10
7. Click on OK
Now that the new variable has been created, another
command is used to assign the codes for the other adult
equivalent groups that have not yet received a value. We
use the replace command.
8. Select Create or change variables from Data
9. Select Change contents of variable.
The replace-Replace contents of variables dialog box
opens.
10. In the Variables box select the name of the
variable that was just created: ae
11. Type .84 in the New Contents box
12. Click on the If/In tab.
13. In the Restrict to observations if box, type in
ca4==2 & (ca3 >=10 & ca3 =20
16. Click on the Main tab.
17. Type .72 in the Contents box .
18. Click on Submit. The dialog box remains open
and the command is run.
19. Type .6 in the Contents box
20. Click on the If/In tab.
21. In the Restrict to observations if box, change
the criteria to: ca3