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Re: st: Drop observations with multiple zero values


From   Sergiy Radyakin <serjradyakin@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Drop observations with multiple zero values
Date   Fri, 7 Jun 2013 16:59:51 -0400

Type in Stata (not in browser):
net from http://www.adeptanalytics.org/radyakin/stata/dropifallz/
Sergiy

On Fri, Jun 7, 2013 at 4:53 PM, Jeph Herrin <stata@spandrel.net> wrote:
>
> egen diff=diff(vars_*)
> egen max=rowmax(vars_*)
> drop if max==0 & diff==0
>
>
>
> On 6/7/2013 4:32 PM, G. Anderson wrote:
>>
>> Sorry- didn't see this. Thank you.
>>
>> Is there any way to standardise the process so I can use a varlist and do
>> not have to manually count the number of
>> variables in that list?
>>
>>
>>
>>
>> On Jun 7 2013, Sergiy Radyakin wrote:
>>
>>> for negatives you can use
>>> tempvar r
>>> egen `r'=anycount(A B C),values(0)
>>> drop if `r'==3
>>>
>>> where 3 is the number of variables in your varlist specified in the
>>> anycount function.
>>> Sergiy
>>>
>>> On Fri, Jun 7, 2013 at 4:06 PM, Sergiy Radyakin <serjradyakin@gmail.com>
>>> wrote:
>>>>
>>>> tempvar r
>>>> egen `r'=rowtotal(A B C)
>>>> drop if `r'==0
>>>>
>>>> missings are treated as zeroes and things get more complicated if any
>>>> of the vars may contain negatives.
>>>> Best, Sergiy
>>>>
>>>> On Fri, Jun 7, 2013 at 4:02 PM, G. Anderson <ga274@cam.ac.uk> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> Does anybody know how I can drop observations if a number of values are
>>>>> zero?
>>>>>
>>>>> I can do this by manually inputting drop if( A==0 & B==0 & C==0) But I
>>>>> was wondering if there was any easier way of
>>>>> doing this (especially when I have a lot of variables)- perhaps using
>>>>> varlist somehow?
>>>>>
>>>>>
>>>>> Many Thanks,
>>>>>
>>>>> Gareth *
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