st: RE: RE: RE: Blinking message when using _rc

["Martin Weiss" <martin.weiss1@gmx.de>]

<>

Note the whole -count- and -drop- part could simply be -assert-ed:


***********
clear*
set obs 10
gen str1 A_X=""
gen str1 B_X=""
gen str1 C_X="p" in 2

local M "A B C"

foreach m of local M{
cap confirm var `m'_X
if !_rc {
	cap as mi(`m'_X)
	if !_rc drop `m'_X 
}
}
***********


HTH
Martin


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: Mittwoch, 28. Juli 2010 23:26
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: RE: Blinking message when using _rc

You may just have omitted an -if-. 

! as the first character on a line will, as Martin says, be interpreted
as a call to the shell.  

Your inner code can be compressed as you don't need to -confirm var-
twice. 

capture confirm variable `m'_X
if !_rc {
	quietly count if missing(`m'_X)
	if  r(N)==_N{
	drop `m'_X
	display "`m'_X" " dropped"
	}
	else replace `m'_X="1" if `m'_X=="P"
}

although the last will fail if the variable in question is numeric. 

Nick 
n.j.cox@durham.ac.uk 

Martin Weiss

Just issue 

***********
!_rc
***********

on its own to see the window. Without the -if- in front of it, it calls
the
OS, and the OS does not know "_rc"... "!" is a synonym for the Stata
command
-shell-...

Duha Altindag

I'm running the program below:

***start***
local M "A B C"
foreach m in `M' {

capture confirm variable `m'_X
!_rc {
quietly count if missing(`m'_X)
if  r(N)==_N{
drop `m'_X
display "`m'_X" " dropped"
}
}

capture confirm variable `m'_X
if !_rc {
replace `m'_X="1" if `m'_X=="P"
}
}
***end***

It does the job that I need. But while it is running, I see a black
windows window for just a moment each (literally), that gives me a
message that reads like:
"!_rc { is not recognized as an internal or external command, operable
program or batch file."
Because the program above runs many times, I see that window multiple
times for a moment, like blinking. I can hardly read it the moment I
see it, but I could write it down after running the code many times.
Does anyone have an idea of what that means?


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