Introduction to Stata 8

Example 3. Analyse Stata data
// winedes.do Descriptive analysis of the wine data 14.5.2001
use c:\dokumenter\wines\wine.dta
describe
codebook
summarize
tab1 type rating
tabulate type rating , chi2 exact
oneway price rating , tabulate
Note that in example 1 and 2 the structure was:
1. Read data (infix, use)
2. Calculation and documentation commands
3. Save data (save)
In these examples a new generation of the data was created; changes were documented with a
do-file with a gen. prefix.
In example 3 the structure was:
1. Read data (use)
2. Analysis commands
No new data generation was created, and the gen. prefix does not belong to such do-files.
Example 4. Elaborate profile.do
/ / c:\ado\personal\profile.do executes automatically when opening Stata.
// Write session start time in time.txt.
set obs 1
gen time="******* Session started: `c(current_date)' `c(current_time)'"
outfile time using c:\tmp\time.txt, noquote replace
clear
// Copy session start time to the cmdlog (cmdlog.txt) and open it.
// ! means that a DOS command follows.
! copy /b c:\tmp\cmdlog.txt + c:\tmp\time.txt c:\tmp\cmdlog.txt /y
cmdlog using c:\tmp\cmdlog.txt , append
//
Open the log (stata.log).
set logtype text
log using c:\tmp\stata.log , replace
Compared to the profile.do suggested in section 1.2, this version adds a time stamp to
the command log file (cmdlog.txt). This means better possibilities to reconstruct previous
work.
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