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Re: st: Dropping variables with mostly missing values again
From
<[email protected]>
To
[email protected]
Subject
Re: st: Dropping variables with mostly missing values again
Date
Fri, 7 Feb 2014 22:04:42 -0500 (GMT-05:00)
Eric wrote me privately and I tried to respond to Statalist but the message was bounced; so ...
1. don't write privately unless you want to hire me for consulting
2. here is a more explicit answer as what you tried won't work:
foreach var of varlist a-b {
qui su `var', meanonly
if `r(N)'<20 drop `var'
}
replace 20 with whatever rule you want
note that this will not work for string variables (use -tabulate- instead of -summarize-
Rich
-----Original Message-----
>From: "Eric M. Uslaner" <[email protected]>
>Sent: Feb 7, 2014 9:00 PM
>To: "[email protected]" <[email protected]>
>Subject: st: Dropping variables with mostly missing values again
>
>Thanks to Rich, Amirsa, Jeph, and Nick. It is likely my ignorance but I can't get this resolved. For the solutions of Rich, Amirsa, and Jeph, I get all missing values. For Nick's suggestion, I have:
>
>foreach V of varlist elecprod1750-visitorrooms2003 {
> npresent,min(20)
> keep `r(`V')'
>}
>
>And I see the npresent results as he suggested. But the do file I constructed above after the last variable leads to:
>
>varlist or in range required
>r(100);
>
>end of do-file
>
>r(100);
>
>And no values are changed. What, please, am I doing wrong? Thanks.
>
>Ric
>
>
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