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Re: st: How to loop a <clean> script over multiple files?


From   Brandon Olszewski <olszewski.brandon@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How to loop a <clean> script over multiple files?
Date   Mon, 23 Jan 2012 12:04:43 -0800

Dmitry - the code worked great. Thanks. I used -tostring- upfront for
some vars since they were in different formats in different files,
then cleaned them up all together later. And, you're quite right about
-append- vs. -merge- + -reshape- since I wanted long format all along.
Thanks to you and Nick. Solved!

On Mon, Jan 23, 2012 at 1:14 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> Note the convention made explicit in the FAQ is that you are presumed
> to be using the current version of Stata unless you specify otherwise.
>
> Nick
>
> On Mon, Jan 23, 2012 at 1:20 AM, Brandon Olszewski
> <olszewski.brandon@gmail.com> wrote:
>> Thanks, Dmitry & Nick. I will tinker with it tomorrow when I'm back in
>> the office.
>> I've used -erase- for this kind of thing before. My office machine
>> runs Windows 7, but my home machine is Ubuntu/Linux, and I'm used to
>> the command terminal and, thus, the forward slashes.
>> We're updating to Stata12 soon, and I'll look for the -rename- options there.
>> Thanks again - hopefully I can get it to fly.
>>
>> On Sat, Jan 21, 2012 at 1:48 AM, Nick Cox <njcoxstata@gmail.com> wrote:
>>> If the OS were WIndows, !rm has its equivalent !del, but regardless of
>>> OS you could use the Stata command -erase-. From a tell-tale forward
>>> slash, I guess Brandon is using some flavour of Unix, but he could be
>>> in Windows and be being smart about using forward slashes in Stata.
>>>
>>> -renvars- (mentioned but not explained by Brandon)  is from SJ. The
>>> new -rename- in Stata 12 is as least as good and has a nicer syntax.
>>>
>>> -fs- (mentioned and explained by Dimitriy) is fine with files in two
>>> or more directories. You just need to say what they are.
>>>
>>> Nick
>>>
>>> On Sat, Jan 21, 2012 at 2:21 AM, Dimitriy V. Masterov
>>> <dvmaster@gmail.com> wrote:
>>>
>>>> Here's some toy code that seems to work as long as the files are all
>>>> in the same directory. You should be able to modify it pretty easily.
>>>>
>>>> I chose a slightly different strategy than you because I find it
>>>> easier to append multiple files than to merge them (though there are
>>>> ssc commands like nmerge and mergeall that you may want to look into).
>>>> You probably want the data in long format anyway.
>>>>
>>>> Let me and the list know if you have any problems. I think regular
>>>> expression/subinstr combo could be improved upon, but I am am too
>>>> lazy.
>>>>
>>>> DVM
>>>>
>>>> *********************************************************
>>>> #delimit;
>>>> clear all;
>>>>
>>>> cd "$lapdesktop"; // Change this!
>>>>
>>>> /* Create Fake Data */
>>>> forvalues v=1/24 {;
>>>>        sysuse auto, clear;
>>>>        outsheet using "data_file_`v'.txt", replace;
>>>> };
>>>>
>>>>
>>>> /* Import the txt data and do some renaming */
>>>> ssc install fs; // don't need to do it each time
>>>> fs data_file*.txt;
>>>>
>>>> foreach txtfile in `r(files)' {;
>>>>        insheet using "`txtfile'", clear;
>>>>        local date "`=regexr("`=subinstr("`txtfile'",".txt","",1)'","[^0-9]+","")'";
>>>> // keep only the numberic part of filename
>>>>        rename make id;
>>>>        gen date=`date';
>>>>        save sd_`date'.dta, replace;
>>>> };
>>>>
>>>>
>>>> /* Combine the Stata Files Into One And Reshape */
>>>> fs sd*.dta;
>>>>
>>>> clear;
>>>>
>>>> append using `r(files)';
>>>>
>>>> sort id date;
>>>>
>>>> reshape wide price-foreign, i(id) j(date);
>>>>
>>>>
>>>> /* Erase both the txt and individual Stata file */
>>>> !rm data_file*.txt;
>>>> !rm sd_*.dta;
>>>> *********************************************************
>
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