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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: extracting of data |

Date |
Wed, 23 Jan 2013 09:09:04 +0000 |

I don't understand Prakash's overall problem and so I do not know whether the strategy suggested is appropriate for his problem. I note that in a very recent thread starting at http://www.stata.com/statalist/archive/2013-01/msg00881.html Prakash was trying to -merge- data files. Perhaps that was a different problem, but clearly -append- and -merge- are not alternative solutions to the same problem. That said, what is wrong here from a Stata point of view can be seen at looking at the code forv l=1/9 { save `mydata', emptyok .... save "D:\TEAM_PC\level`l'_list.dta", replace } As above, the outer loop starts with a -save-, but second time around the loop the file `mydata' already exists, so Stata complains. A wild guess is that Prakash should add erase `mydata' to the end of the loop, but that's just a possible fix for this specific problem. Nick On Wed, Jan 23, 2013 at 4:58 AM, Prakash Singh <prakashbhu@gmail.com> wrote: > Jeph thanks for the kind help. > There seems to be small problem, if you could lighten a bit more then > I think I am through. > > Though the loop is reading all the dct file within level but in the > end it gives error massage > > file D:\TEAM_PC\level1_list.dta saved > file C:\Users\Prakash\AppData\Local\Temp\ST_00000003.tmp already exists > r(602); > > Prakash > > > On Tue, Jan 22, 2013 at 11:49 PM, Jeph Herrin <stata@spandrel.net> wrote: >> Do you have 9 different .dct files for each level? Then maybe you intend >> something like this: >> >> >> clear >> set more off >> set mem 500m >> tempfile mydata >> forv l=1/9 { >> save `mydata', emptyok >> forv d=1/9 { >> infile using D:\TEAM_PC\level`l'\level`d'.dct, clear >> >> capture append using `mydata' >> save `mydata', replace >> } >> keep if level==`l' >> save "D:\TEAM_PC\level`l'_list.dta", replace >> } >> >> hth, >> Jeph >> >> >> On 1/21/2013 1:15 PM, Prakash Singh wrote: >>> >>> Nick >>> Though I managed to write the code and run it but I realised today >>> that for each level stata is extracting data from only one txt file. >>> which means that only one dct file is being read. >>> >>> here is the revised code >>> >>> clear >>> set more off >>> set mem 500m >>> tempfile mydata >>> forv l=1/9 { >>> infile using D:\TEAM_PC\level`l'\level`l'.dct, clear >>> capture append using `mydata' >>> save `mydata', replace >>> keep if level==`l' >>> save "D:\TEAM_PC\level`l'_list.dta", replace >>> } >>> >>> >>> Regards >>> Prakash >>> >>> On Tue, Jan 1, 2013 at 9:32 PM, Prakash Singh <prakashbhu@gmail.com> >>> wrote: >>>> >>>> Thanks Nick >>>> I got it finally >>>> >>>> Best wishes to all stata listers for 2013 >>>> >>>> Regards >>>> Prakash >>>> >>>> On Mon, Dec 31, 2012 at 11:10 PM, Nick Cox <njcoxstata@gmail.com> wrote: >>>>> >>>>> I don't understand what is holding you up. Your code shows that you >>>>> are familiar with -foreach- and -forval-. So you need to write another >>>>> big loop using that construct. >>>>> >>>>> Nick >>>>> >>>>> On Mon, Dec 31, 2012 at 4:37 PM, Prakash Singh <prakashbhu@gmail.com> >>>>> wrote: >>>>>> >>>>>> Nick, I thanked you for that >>>>>> >>>>>> I mentioned in the first mail that the structure of the data is such >>>>>> that to have final data I need to extract 9 (using 9 dct file for each >>>>>> level) different level files then some of them I need to reshape and >>>>>> then merge them. >>>>>> >>>>>> >>>>>> Hope, I have made my query more clear to you. >>>>>> >>>>>> regards >>>>>> Prakash >>>>>> On Mon, Dec 31, 2012 at 9:48 PM, Nick Cox <njcoxstata@gmail.com> wrote: >>>>>>> >>>>>>> You don't comment on my replacement of 9 lines of code with 1. >>>>>>> >>>>>>> Your main loop looks like another -forval- or -foreach- loop but you >>>>>>> don't explain why you want to save different levels in different >>>>>>> datasets. >>>>>>> >>>>>>> Nick >>>>>>> >>>>>>> On Mon, Dec 31, 2012 at 2:27 PM, Prakash Singh <prakashbhu@gmail.com> >>>>>>> wrote: >>>>>>>> >>>>>>>> Nick sorry but that is type error. >>>>>>>> Thanks for the suggestion anyway. >>>>>>>> >>>>>>>> Moreover I am looking some help on creating look so that I can repeat >>>>>>>> the following code for each level 1 to 9. >>>>>>>> >>>>>>>> clear >>>>>>>> set more off >>>>>>>> set mem 500m >>>>>>>> tempfile mydata >>>>>>>> foreach l of numlist 11/19 { >>>>>>>> infile using D:\TEAM_PC\level`l'.dct, clear >>>>>>>> capture append using `mydata' >>>>>>>> save `mydata', replace >>>>>>>> } >>>>>>>> use `mydata', clear >>>>>>>> keep if level==1 >>>>>>>> save level1_list.dta", replace >>>>> >>>>> * >>>>> * For searches and help try: >>>>> * http://www.stata.com/help.cgi?search >>>>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>>>> * http://www.ats.ucla.edu/stat/stata/ >>> >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>> * http://www.ats.ucla.edu/stat/stata/ >>> >>> >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**References**:**Re: st: extracting of data***From:*Prakash Singh <prakashbhu@gmail.com>

**Re: st: extracting of data***From:*Prakash Singh <prakashbhu@gmail.com>

**Re: st: extracting of data***From:*Jeph Herrin <stata@spandrel.net>

**Re: st: extracting of data***From:*Prakash Singh <prakashbhu@gmail.com>

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