Programming Stata - Agricultural Statistical Data Analysis Using Stata - page 139

so the first step in writing this program is to enter capture pro-
gram drop anovalsd . Remember this line drops the program
anovalsd from memory and ignores any error code that may occur if
the program is not in memory. The next line to enter is program
anovalsd , which defines the program. The next line args tells
the program that subsequent items are arguments, which will be
used in the program. When this program is run, it requires three
arguments, which are passed to the program. To use the program
after it has been run, you would enter anovalsd depend indep1
rep where the three arguments would be the variable names from
the dataset in memory representing the dependent, independent,
and replication variables.
The next line set more off , as mentioned previously, turns off
the pause feature in the Results window. Usually output is paused
with every screen requiring the user to hit a key to see the next screen.
By turning off this feature, the results are displayed all at once with-
out pausing.
quietly: summarize `depend' is one of the great features of
Stata programming. Executing a command quietly means no out-
put is to be generated. Instead the command summarize is executed
and values calculated by this command are stored in memory. These
saved results then can be used by subsequent commands. To dem-
onstrate this, load the dataset Onion varieties programming.dta and
enter the following command:
summarize Yield
This results in the following output:
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------
Yield | 20 102.4 10.43259 82.5 122.5
Now enter the command
return list
This results in the following output: