Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: st: Retrieving data from matrix


From   "Francis, Richard N" <[email protected]>
To   "[email protected]" <[email protected]>
Subject   RE: st: Retrieving data from matrix
Date   Mon, 2 Dec 2013 22:48:15 +0000

Nick,

If the code below is creating new columns for each pass through the loop, how would I modify the code to create new ROWS instead?

destring gvkey, replace
 egen id = group(gvkey), label
 gen date1 = yq(year, fqtr)
 tsset id date1, quarterly
 su id, meanonly
 local limit=r(max)
 foreach v in k maic sic rmse DFGLS {
      g `v' = .
 }
 gen which = ""

 forval i = 1/`limit' {
         display "Iteration of `i' of `limit"
         replace which = "`: label (id) `i''" in `i'
         dfgls fcf if id == `i' , maxlag(4) ers
		 matrix results=r(results)
		 svmat results, names(iter`i'_)
         qui foreach v in k maic sic rmse DFGLS {
                replace `v' = r(`v') in `i'
		
         }
}

Thank you for all you do!

Rick Francis


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: Monday, December 02, 2013 3:01 PM
To: [email protected]
Subject: Re: st: Retrieving data from matrix

The error is coming from -svmat-. Consider that _second_ time around the loop -svmat- is trying to use the names for new variables that it used _first_ time around the loop. You must exploit the -name()- option to use different names each time around the loop. e.g.

svmat results, names(iter`i'_)
Nick
[email protected]


On 2 December 2013 21:22, Francis, Richard N <[email protected]> wrote:
> Hi Statalist members,
>
> Have a simple program below, but receive the following error:
>
> "new variables cannot be uniquely named or already defined"
>
> I am using Stata13 with Windows.
>
> The first execution of the loop works fine, then as the second loop is ending, I receive the "new variables cannot be uniquely named or already defined" error message.
>
> Here is the code:
>
> destring gvkey, replace
>  egen id = group(gvkey), label
>  gen date1 = yq(year, fqtr)
>  tsset id date1, quarterly
>  su id, meanonly
>  local limit=r(max)
>  foreach v in k maic sic rmse DFGLS {
>       g `v' = .
>  }
>  gen which = ""
>
>  forval i = 1/`limit' {
>          display "Iteration of `i' of `limit"
>          replace which = "`: label (id) `i''" in `i'
>          dfgls fcf if id == `i' , maxlag(4) ers
>                  matrix results=r(results)
>                  svmat results
>          qui foreach v in k maic sic rmse DFGLS {
>                 replace `v' = r(`v') in `i'
>
>          }
> }
>
>
> In this case, the matrix is 4x5, and the replace `v' command above creates 4 new rows.
>
> How would I modify this to create only one new row from the matrix?
>
> Any ideas are greatly appreciated!
>
> Thank you for your time and expertise!
>
>
> Rick Francis
>
>
> *
> *   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/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index