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

Stata 11 Sample Session Section 2 – Restructuring Data Files – Table Lookup & Aggregation
foreach qtr of numlist 1/4 {
local m3 = `qtr'*3
local m2 = (`qtr'*3)-1
local m1 = (`qtr'*3)-2
generate incqtr`qtr' = inc`m1' + inc`m2' + inc`m3'
}
This command computes the quarterly income variables
incqtr1-incqtr4 using the foreach command.
Display the final output table We can now display a table showing the average caloric
production in quartiles for each of the districts.
1. From the menus click on Statistics then
Summaries, tables & tests then Summary and
Descriptive Statistics then Summary statistics
The summarize - Summary statistics dialog box
opens.
2. In the Variable(s): box select cprod_ae.
3. Click on the “by/if/in” tab.
4. Click in the box “Repeat command for
groups defined by”
5. In the box below this option, select district
quart
6. Click on the copy button, switch to the do-file
editor, paste the command, switch back to the
dialog box and click on Ok.
7. Add a comment to explain what you have done.
The Stata command is:
by district quart sort: summarize cprod_ae
You should note that the mean for the 2nd quartile in
Monapo is 2,539.364. The output from the summarize
command gives you the numbers necessary for the table.
However the output is difficult to read. There is another
command, table, which can also be used to produce the
final table. We will discuss this command in Section 3.
Before you save the file, you should sort the file by the
key variables and then save this file as hh-file3,dta.
1. Sort the file by the key variables. Type in the
Command window:
Sort district vil hh
2. We no longer need the variable _merge so it
should be dropped. Type in the Command
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