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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
Re: st: A comment on abbreviations |

Date |
Mon, 22 Sep 2008 22:20:50 +0200 |

Sergiy,

thanks, I was not even aware of -unab-. With its help, I might even figure out the -program- myself.

HT

Martin

_______________________

----- Original Message ----- From: "Sergiy Radyakin" <serjradyakin@gmail.com>

To: <statalist@hsphsun2.harvard.edu>

Sent: Monday, September 22, 2008 10:13 PM

Subject: Re: st: A comment on abbreviations

Martin, you can use the maintanence files mentioned earlier.

E.g. here is an extract from ....\Stata10\ado\updates\r\rhelp_alias.maint:

reg regress

...... skipped ........................................................

regr regress

regre regress

regres regress

Note that reg.ado exists but calls regress, which in turn calls _regress.

So you have a chain like this (example):

alph--> alpha-->alpha_hidden

(here alph is an alias, which in fact calls alpha which is implemented

in alpha_hidden) and your program has to decide where to stop.

Maintanence files seem to eliminate this problem providing you

directly with the name of the command. All you have to do is check

that the corresponding word is recognized by Stata as a statement.

-which- will help you with that.

Use -unab- to expand variable names. But this can be difficult in

cases when a command is issued when those variables are _not there

yet_, as in :

clear

use p using ".\ado\base/a/auto.dta"

since variable is not there yet, we don't know what it expands to. If

you do expansion after the command then the problem would be e.g. in

-drop-, since the variable may not exist _any longer_.

Best regards,

Sergiy Radyakin

On Mon, Sep 22, 2008 at 3:05 PM, Martin Weiss <martin.weiss1@gmx.de> wrote:

Last night I was wondering whether I could write a small -program- that

would let me run abbreviated code through Stata, such as the now

immortalized -prob f p w- and have Stata create a log or screen output

returning the fully expanded version -probit foreign weight price- (which I

could then paste into the mail to the list).

At first I sought refuge in the -e(cmdline)- returned by estimation

commands, but that one merely expands -probit- while still leaving -f w p-

untouched. Furthermore, it would work only for those commands that bother to

return -e(cmdline)-. So, as a challenge to the more seasoned programmers on

the list, is there a way to do it? If there is one, I could type my beloved

abbreviations while posting fully expanded commands to the list...

Martin

_______________________

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**References**:**RE: st: A comment on abbreviations***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**Re: st: A comment on abbreviations***From:*"Sergiy Radyakin" <serjradyakin@gmail.com>

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