constant date

[Gerard M. Keogh]

Dear all,

newbie Q.

I want to refer to a constat date 31/12/2008 in spss code.
Is there asimple way to do this?

In SAS for example I might have

If mydate <= '31/12/2008'd ;

What the spss equivalent?

I can create a string var =31/12/2008 and convert but it's not really code?

thanks
Gerard


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Is le haghaidh an duine nó an eintitis ar a bhfuil sí dírithe, agus le haghaidh an duine nó an eintitis sin amháin, a bheartaítear an fhaisnéis a tarchuireadh agus féadfaidh sé go bhfuil ábhar faoi rún agus/nó faoi phribhléid inti. Toirmisctear aon athbhreithniú, atarchur nó leathadh a dhéanamh ar an bhfaisnéis seo, aon úsáid eile a bhaint aisti nó aon ghníomh a dhéanamh ar a hiontaoibh, ag daoine nó ag eintitis seachas an faighteoir beartaithe. Má fuair tú é seo trí dhearmad, téigh i dteagmháil leis an seoltóir, le do thoil, agus scrios an t-ábhar as aon ríomhaire. Is é beartas na Roinne Dlí agus Cirt, Comhionannais agus Athchóirithe Dlí, agus na nOifígí agus na nGníomhaireachtaí a úsáideann seirbhísí TF na Roinne, seoladh ábhair cholúil a dhícheadú.
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[Marks, Jim]

The DATE.DMY function will do this:

IF mydate LE DATE.MDY(31,12,2008)

--jim

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Gerard M. Keogh
Sent: Tuesday, June 02, 2009 10:21 AM
To: [hidden email]
Subject: constant date


Dear all,

newbie Q.

I want to refer to a constat date 31/12/2008 in spss code.
Is there asimple way to do this?

In SAS for example I might have

If mydate <= '31/12/2008'd ;

What the spss equivalent?

I can create a string var =31/12/2008 and convert but it's not really code?

thanks
Gerard


**********************************************************************************
The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.  It is the policy of the Department of Justice, Equality and Law Reform and the Agencies and Offices using its IT services to disallow the sending of offensive material.
Should you consider that the material contained in this message is offensive you should contact the sender immediately and also mailminder[at]justice.ie.

Is le haghaidh an duine nó an eintitis ar a bhfuil sí dírithe, agus le haghaidh an duine nó an eintitis sin amháin, a bheartaítear an fhaisnéis a tarchuireadh agus féadfaidh sé go bhfuil ábhar faoi rún agus/nó faoi phribhléid inti. Toirmisctear aon athbhreithniú, atarchur nó leathadh a dhéanamh ar an bhfaisnéis seo, aon úsáid eile a bhaint aisti nó aon ghníomh a dhéanamh ar a hiontaoibh, ag daoine nó ag eintitis seachas an faighteoir beartaithe. Má fuair tú é seo trí dhearmad, téigh i dteagmháil leis an seoltóir, le do thoil, agus scrios an t-ábhar as aon ríomhaire. Is é beartas na Roinne Dlí agus Cirt, Comhionannais agus Athchóirithe Dlí, agus na nOifígí agus na nGníomhaireachtaí a úsáideann seirbhísí TF na Roinne, seoladh ábhair cholúil a dhícheadú.
Más rud é go measann tú gur ábhar colúil atá san ábhar atá sa teachtaireacht seo is ceart duit dul i dteagmháil leis an seoltóir láithreach agus le mailminder[ag]justice.ie chomh maith.
***********************************************************************************


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[Carlos Renato (www.estatistico.org)]

Hi Gerard

   It´s possible. If you haven't a variable that contains a reference date you can create this using the macro below.
The parameters of the macro is the DAY, the MONTH and the YEAR separated by "/" and "." in the final. If no
parameters are provided, the current date is computed.

/*Gera a data de referência.
/*Data de criação 09/04/2006.
DEFINE MacroCriaDataReferencia (!POSITIONAL=!DEFAULT('NONE') !CHAREND('/')/ !POSITIONAL=!DEFAULT('NONE') !CHAREND('/')/ !POSITIONAL=!DEFAULT('NONE') !CMDEND)
!IF ((!1 !NE 'NONE') !OR (!2 !NE 'NONE') !OR (!3 !NE 'NONE')) !THEN
COMPUTE #DIA_REFERENCIA = !1.
COMPUTE #MES_REFERENCIA = !2.
COMPUTE #ANO_REFERENCIA = !3.
COMPUTE DATA_REFERENCIA=DATE.DMY(#DIA_REFERENCIA,#MES_REFERENCIA,#ANO_REFERENCIA).
FORMATS DATA_REFERENCIA(EDATE10).
EXECUTE.
!ELSE
STRING DATA_REFERENCIA_TEMP (A10).
COMPUTE DATA_REFERENCIA_TEMP=$DATE.
EXECUTE.
NUMERIC DIA_REFERENCIA (F2).
STRING MES_REFERENCIA_TEMP (A3).
NUMERIC ANO_REFERENCIA (F2).
COMPUTE DIA_REFERENCIA=NUMBER(SUBSTR(DATA_REFERENCIA_TEMP,1,2), F2).
COMPUTE MES_REFERENCIA_TEMP=SUBSTR(DATA_REFERENCIA_TEMP,4,3).
COMPUTE ANO_REFERENCIA=NUMBER(SUBSTR(DATA_REFERENCIA_TEMP,8,2), F4).
RECODE
  MES_REFERENCIA_TEMP  ('JAN'='1')  ('FEB'='2')  ('MAR'='3')  ('APR'='4')  ('MAY'='5')  ('JUN'='6')  ('JUL'='7')  ('AUG'='8')
   ('SEP'='9')  ('OCT'='10')  ('NOV'='11')  ('DEC'='12')  .
EXECUTE.
COMPUTE MES_REFERENCIA=NUMBER(MES_REFERENCIA_TEMP, F2).
EXECUTE.
COMPUTE DATA_REFERENCIA=DATE.DMY(DIA_REFERENCIA,MES_REFERENCIA,ANO_REFERENCIA).
FORMATS DATA_REFERENCIA(EDATE10).
EXECUTE.
DELETE VARIABLES DIA_REFERENCIA MES_REFERENCIA ANO_REFERENCIA MES_REFERENCIA_TEMP DATA_REFERENCIA_TEMP.
!IFEND.
!ENDDEFINE.

/*MacroCriaDataReferencia 12/10/1980.

To convert a string variable that contains dates, you can use this other macro, where you provide the name of the
string that contains the dates.
/* Formata Data
/* Data de criação 08/04/2006.
DEFINE MacroFormataDataV2 (VarData=!DEFAULT(DATE) !TOKENS(1))
NUMERIC DIA_CALC (F4).
NUMERIC MES_CALC (F4).
NUMERIC ANO_CALC (F4).
DO IF (SUBSTR(!Vardata,6,1) EQ "/").
COMPUTE MES_CALC = NUMBER(SUBSTR(!VarData,4,2),F4).
COMPUTE DIA_CALC = NUMBER(SUBSTR(!VarData,1,2),F4).
COMPUTE ANO_CALC = NUMBER(SUBSTR(!VarData,7,4),F4).
ELSE IF (SUBSTR(!Vardata,5,1) EQ "/") AND (SUBSTR(!Vardata,2,1) EQ "/").
COMPUTE MES_CALC = NUMBER(SUBSTR(!VarData,3,2),F4).
COMPUTE DIA_CALC = NUMBER(SUBSTR(!VarData,1,1),F4).
COMPUTE ANO_CALC = NUMBER(SUBSTR(!VarData,6,4),F4).
ELSE IF (SUBSTR(!Vardata,5,1) EQ "/") AND (SUBSTR(!Vardata,3,1) EQ "/").
COMPUTE MES_CALC = NUMBER(SUBSTR(!VarData,4,1),F4).
COMPUTE DIA_CALC = NUMBER(SUBSTR(!VarData,1,2),F4).
COMPUTE ANO_CALC = NUMBER(SUBSTR(!VarData,6,4),F4).
ELSE IF (SUBSTR(!Vardata,4,1) EQ "/").
COMPUTE MES_CALC = NUMBER(SUBSTR(!VarData,3,1),F4).
COMPUTE DIA_CALC = NUMBER(SUBSTR(!VarData,1,1),F4).
COMPUTE ANO_CALC = NUMBER(SUBSTR(!VarData,5,4),F4).
END IF.
EXECUTE.
COMPUTE DATA_CALC=DATE.DMY(DIA_CALC,MES_CALC,ANO_CALC).
FORMATS DATA_CALC(EDATE10).
EXECUTE.
DELETE VARIABLES DIA_CALC MES_CALC ANO_CALC.
!ENDDEFINE.

/*MacroFormataDataV2 Vardata=v1.

To compare dates, you can make this in the menu compute or recode
variables and compare a reference date or a range of dates.

Carlos Renato
Statistician
Recife - Brazil

[Richard Ristow]

At 11:20 AM 6/2/2009, Gerard M. Keogh wrote:

>I want to refer to a constant date 31/12/2008 in spss code. Is there
>a simple way to do this? In SAS for example I might have
>
>If mydate <= '31/12/2008'd ;
>
>What is the spss equivalent?

Unfortunately, there isn't one. SPSS doesn't have date constants :'(
. I've long argued it's a serious deficiency. (And it should be
readily remediable; adding date constants shouldn't break any
existing code or data files.)

As others have written, the usual work-around is an expression that
calculates the desired date from numeric month-day-year values, or
sometimes a string. That's fine, except for a few cases where SPSS
doesn't accept expressions.

Onward, with a sigh,
Richard :-[

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[necia]

There are date and time functions that might help. If you use such a
function, SPSS will store the date as the number of seconds since Oct 14,
1582. So, it is a number and you ought to be able to compare two date
formatted values and pull out what you need.

I used to use the date formats to find out how long a premature newborn
infant stayed in the hospital by subtracting birth date from the discharge
and (like dividing by number of seconds in the hour or day or month).
Whatever.

Actually, I think there are conversion functions to do that calculation so
you don't have to do any division by seconds.  It's been a long time since
I did that.

Look up the date and time functions - there are many many such functions.
There likely be one that will do what you want.
Good luck,

Necia A. Black, Ph.D.           e-mail:  [hidden email]
246 Computing Center            Web URL:http://www.acsu.buffalo.edu/~black
SUNY-Buffalo
Buffalo, New York 14260

On Tue, 2 Jun 2009, Richard Ristow wrote:

> At 11:20 AM 6/2/2009, Gerard M. Keogh wrote:
>
>> I want to refer to a constant date 31/12/2008 in spss code. Is there
>> a simple way to do this? In SAS for example I might have
>>
>> If mydate <= '31/12/2008'd ;
>>
>> What is the spss equivalent?
>
> Unfortunately, there isn't one. SPSS doesn't have date constants :'(
> . I've long argued it's a serious deficiency. (And it should be
> readily remediable; adding date constants shouldn't break any
> existing code or data files.)
>
> As others have written, the usual work-around is an expression that
> calculates the desired date from numeric month-day-year values, or
> sometimes a string. That's fine, except for a few cases where SPSS
> doesn't accept expressions.
>
> Onward, with a sigh,
> Richard :-[
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
>
>

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[Dennis Deck]

One workaround, of course, is to define a macro to store the constant
like:

DEFINE CurrentYear() 2008 !ENDDEFINE.


Dennis Deck
RMC Research

-----Original Message-----
From: Richard Ristow [mailto:[hidden email]]
Sent: Tuesday, June 02, 2009 12:46 PM
Subject: Re: constant date

At 11:20 AM 6/2/2009, Gerard M. Keogh wrote:

>I want to refer to a constant date 31/12/2008 in spss code. Is there
>a simple way to do this? In SAS for example I might have
>
>If mydate <= '31/12/2008'd ;
>
>What is the spss equivalent?

Unfortunately, there isn't one. SPSS doesn't have date constants :'(
. I've long argued it's a serious deficiency. (And it should be
readily remediable; adding date constants shouldn't break any
existing code or data files.)

As others have written, the usual work-around is an expression that
calculates the desired date from numeric month-day-year values, or
sometimes a string. That's fine, except for a few cases where SPSS
doesn't accept expressions.

Onward, with a sigh,
Richard :-[

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