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From |
Jean-Benoit Hardouin <jean-benoit.hardouin@orscentre.org> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: New command in SSC: -checkfor2- |

Date |
Mon, 19 Sep 2005 21:02:52 +0200 |

adiallo5@worldbank.org a écrit :

Jean,OK, that's right (I have considered only one (other) aim which interests me : the possibility to obtain a list of the variables with a little amount of missing values)

I will try to improve my code based on your remarks.

Essentially, I used anything in place of varlist because with the latter

the program aborts when a variable specified does not

exist. But this is the core of the program: check whether

the variable exists or not.

I will consider the use of return, but why a table?If you have full of variables, your outputs are difficult to read: a table allows obtaining a synthetic result !

Best,

Jean-Benoit

I'll contact you privately to further discuss about these topics.

Best regards.

Amadou.

Jean-Benoit Hardouin <jean-benoit.hardouin@ors To: statalist@hsphsun2.harvard.edu centre.org> cc: Sent by: Subject: Re: st: RE: New command in SSC: -checkfor2- owner-statalist@hsphsun2. harvard.edu 09/19/2005 02:28 PM Please respond to statalist

Dear Amadou,

I find several drawbacks in the programing of -checkfor2- :

- the use of "anything" instead of "varlist" in the syntax command

avoids to use list of variables as var1-var10 or var*

- the idea to use a global macro variable is, from my mind, a bad

idea (I prefer a "return" command)

- the "red" characters concerns by convention the error messages

and are not adapted to an output

- the "outputs" as string are not very easy to read when we have

full of variables (why not a table)

- the smcl syntax in the hlp file is uncorrect to format the

paragraphs: the result is not very nice

- the classical way to present the hlp file is to separate the

description of the options and the syntax (in 2 parts)

I hope this help !

The idea of your command is good, but your command is not very easy to

use !

/*Amadou, pas de problème si tu as besoin d'aide en français pour

améliorer ta commande !*/

Jean-Benoit Hardouin

*******************************************

Jean-Benoit Hardouin

Regional Health Observatory - Orléans - France

Biostatisticien

Observatoire Régional de la Santé du Centre

BP 2439

1, rue Porte Madeleine

45032 Orléans Cedex 1

tél : 02 38 74 48 80

fax : 02 38 74 48 81

Email : jean-benoit.hardouin@orscentre.org

*********************************************

adiallo5@worldbank.org a écrit :

A long way to go before becoming a good stata programmer.

Thanks to Nick.

I will make the necessary corrections today and resubmit.

You've made two very good observations. And I really need

that kind of remarks to help me improve my first steps as

a real stata programmer.

I am so used of nmissing that I guess I've used it without even

noticing it.

In the same token, working with DHS data usually require sorting

data before attempting many managements.

I guess there also, my old reflexes just prompted up, without even

noticing.

Again, thanks for your good remarks. In the future, I'll be more

cautious to these kind of details.

Amadou.

"Nick Cox"

<n.j.cox@durham.ac.uk> To:<statalist@hsphsun2.harvard.edu>

Sent by: cc:

owner-statalist@hsphsun2. Subject: st: RE: Newcommand in SSC: -checkfor2-

harvard.edu

09/19/2005 01:05 PM

Please respond to

statalist

*

Note that -checkfor2- runs the user-written command -nmissing-

which would need to be installed separately if a user had

not previously installed that. The help file makes

a cross-reference to this program but does not spell out

that it is required.

As it happens, it is not clear why -nmissing- is used at

all, as it is only employed to pick up the number of

missings which could, and indeed should, be done much

more efficiently and directly with a -count-.

Another detail that is worthy of note is that -checkfor2-

-sort-s on each variable in turn. This is not documented,

appears unnecessary for what the program does, and is

indeed a misfeature as in general -checkfor2- will

change the sort order of your data. I think it is a

good principle that Stata commands should only change

the sort order of your data when that is a purpose

of the command and is also explicitly documented.

Nick

n.j.cox@durham.ac.uk

adiallo5@worldbank.org

Thanks to Prof. Baum, a new Stata command is available from the SSC*

archives:

-checkfor2- A Stata module to check whether a variable exists

or not in a

dataset.

Description:

checkfor2 is a routine to check for existence of a list of

variables within a

(usually big) data set.

checkfor2 searchs through the data whether the variable

exists. If it does not,

a message is issued.

If it does, the program looks for missings structure.

Finally, if requested, the

program stores the

available variables in a macro for future use. A tolerance

level for missings

could also be set.

To install the package, type:

.ssc install checkfor2

* For searches and help try:

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* http://www.ats.ucla.edu/stat/stata/

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* For searches and help try:

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* http://www.ats.ucla.edu/stat/stata/

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* For searches and help try:

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* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: RE: New command in SSC: -checkfor2-***From:*adiallo5@worldbank.org

**References**:**Re: st: RE: New command in SSC: -checkfor2-***From:*adiallo5@worldbank.org

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