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Re: st: How to Define MDY Variable Given Separate Y and MD Variables


From   Muhammad Anees <aneesmkhattak@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How to Define MDY Variable Given Separate Y and MD Variables
Date   Mon, 30 May 2011 15:22:29 +0500

Nick you are right. You suggestion has worked fantatstically out for
me. Sorry for not clarifying my statement which could be as the
Date-Month variable have values like date-month.

On 30 May 2011 14:30, Nick Cox <njcoxstata@gmail.com> wrote:
> I understand that holidays are different, but I don't understand what
> you want precisely other than your first sentence. But getting a
> single date variable follows from the principles explained in -help
> dates_and_times-.
>
> Your example cannot be literal, as Stata would not allow the variable
> name -date-month- with an embedded hyphen. I will guess at an
> underscore, that your -date_month- variable is string, and that your
> -year-  variable is numeric, in which case try something like
>
> gen date = date(day_month + string(year), "DMY")
> format date %td_d_m_CY
>
> What the data look like is secondary; use -describe- in such questions
> to tell us what they are, especially if this is not enough advice.
>
> Nick
>
> On Mon, May 30, 2011 at 9:44 AM, Muhammad Anees <aneesmkhattak@gmail.com> wrote:
>
>> I have been trying to define a singe data variable from the given two
>> date variables named YEAR and DATE-MONTH for data from from Jan 01,
>> 2005 to Dec 31, 2010. Also the month variable has breaks for holidays.
>> I need to merge the two variable so I could define the yearly specific
>> date with month to compare trends of stocks across the years.
>>
>> The data looks like
>>
>> . li    year day-month in       1/20
>>
>>        +-----------------+
>>        year   day-month
>>        -----------------
>> 1.      2010     31-Dec
>> 2.      2010     30-Dec
>> 3.      2010     29-Dec
>> 4.      2010     28-Dec
>> 5.      2010     27-Dec
>>        -----------------
>> 6.      2010     24-Dec
>> 7.      2010     23-Dec
>> 8.      2010     22-Dec
>> 9.      2010     21-Dec
>> 10.     2010     20-Dec
>>        -----------------
>> 11.     2010     15-Dec
>> 12.     2010     14-Dec
>> 13.     2010     13-Dec
>> 14.     2010     10-Dec
>> 15.     2010     09-Dec
>>        -----------------
>> 16.     2010     08-Dec
>> 17.     2010     07-Dec
>> 18.     2010     06-Dec
>> 19.     2010     03-Dec
>> 20.     2010     02-Dec
>>        +-----------------+
>>
>
> *
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> *   http://www.ats.ucla.edu/stat/stata/
>



-- 
---
Best,


---------------
Anees

*
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