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Stata Technical Bulletin

Example

The following example shows the use of a few of the commands on a short artificial data set.

. list

	m	У
1.	2	1992
2.	2	1994
3.	4	1994
4.	7	1994
ε.	12	1994

. Iastbday m y, generate (Ibday)
. list

	m	У	Ibday
1.	2	1992	28
2.	2	1994	28
3.	4	1994	29
4.	7	1994	29
ε.	12	1994	30
mdytodow m Ibday у.		, gen(dow)
list
	m	У	Ibday	do w
1.	2	1992	28	Fri.
2.	2	1994	28	Mon.
3.	4	1994	29	Fri.
4.	7	1994	29	Fri.
ε.	12	1994	30	Fri.
list,	nolabel
	m	У	Ibday	do w
1.	2	1992	28	ε
2.	2	1994	28	1
3.	4	1994	29	ε
4.	7	1994	29	ε
ε.	12	1994	30	ε

. describe

Contains data

Obs :	ε	(max=	8088)
Vars :	4	(max=	99)
Width:	12	(max=	200)

1. m	float '∕₀9.Og
2. y	float	7.9.0g
3. Ibday	int	7.8.0g
4. do w	int	7.8.0g	Dayslab

Sorted by:

Note that the new variable dow is an integer, but has been given the label Dayslab.

Each of these date commands may also be used in immediate form. To use the command in immediate form, simply type
the name of the command along with the numbers or strings for the day, month, or year you want converted. The command
will display its results to the screen as well as saving them in the global macros S_l-S_4.

Example

. lastday 2 1992
29

Saturday, February 29, 1992

. disp_s

S_l: 29

S_2: Saturday

S_3: Sat

S_4: Sat.

. today

July 1, 1994

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