Re: st: RE: Stata analog to Mata's -strdup()- or better approach?

[Nick Cox <njcoxstata@gmail.com>]

Have you thought of something like

clonevar fstring = estring
replace fstring = subinstr(fstring, "-", " ", .)
split fstring

On Fri, Mar 11, 2011 at 11:18 PM, Rebecca Pope <rebecca.a.pope@gmail.com> wrote:
> Nick and Brendan -- Thank you for your help.
>
> Brendan -- I should have specified that I've got about 6 million
> observations. With 180 "c" variables, I don't have enough memory to
> perform the -reshape-.
>
> Nick -- Your solution produces the same result as my original program
> but takes up less real estate in the do file & runs faster, so clearly
> an improvement. However, it still relies on -strpos()- and thus only
> finds the first instance of the set of Xs.
>
> The only solution I could think of, and maybe I'm just being obtuse
> (late Friday here, so certainly a possibility), was to use something
> like -strpos(substr(estring,`i',180),X) - and loop until I'd found all
> of the locations for X. However, given the number of observations, I'm
> concerned about how time-intensive this will be. I can obviously keep
> just the observations with multiple eligibility periods of the same
> length and merge back later. If you have any further suggestions, I'd
> really appreciate hearing them.
>
> p.s. Sorry for debasing your function by calling it an option. :)
>
> Rebecca
>
>
>
>
> On Fri, Mar 11, 2011 at 3:20 PM, Nick Cox <njcoxstata@gmail.com> wrote:
>> should be
>>
>>  replace longest = `i' if strpos(estring, X)
>>
>> as there is absolutely no need to evaluate -length(X)- (repeatedly)
>> when it is in fact known.
>>
> < truncated >

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/