<>
*************
clear*
inp year str10(Uni Prof)
1990 Harvard " S Smith"
1990 "" "S Smith"
1990 UCLA "P Williams"
1990 Yale " K John"
1991 "" "K Evert"
1991 Oxford "K Evert"
1991 "" "K Evert"
end
replace Uni=trim(Uni)
replace Prof=trim(Prof)
compress
gen byte nonmiss=!mi(Uni)
//replace with last obs
bys year Prof (nonmiss): /*
*/ replace Uni=Uni[_N] /*
*/ if nonmiss==0
l, noo sepby(year Prof)
*************
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von joe j
Gesendet: Donnerstag, 8. Oktober 2009 12:33
An: [email protected]
Betreff: Re: st: AW: egen(mean or suchlike) for a string variable
Thanks. (Your suggestion helped me create a variable that takes a
numeric value, instead of the university name; this is definitely an
improvement.)
This is how the data looks like:
Year University Professor
1990 Harvard S Smith
1990 --------- S Smith
1990 UCLA P Williams
1990 Yale K John
1991 --------- K Evert
1991 Oxford K Evert
What I want is to replace the missing names above, in 1990 with
Harvard and in 1991 with Oxford.
JJ
On Thu, Oct 8, 2009 at 11:59 AM, Martin Weiss <[email protected]> wrote:
>
> <>
>
>
>
> You should turn the string into a numeric variable via -encode-. Then
-egen-
> can go to work. Also provide an excerpt of your data and show what you
want
> to happen to them...
>
>
>
> HTH
> Martin
>
> -----Ursprüngliche Nachricht-----
> Von: [email protected]
> [mailto:[email protected]] Im Auftrag von joe j
> Gesendet: Donnerstag, 8. Oktober 2009 11:57
> An: [email protected]
> Betreff: st: egen(mean or suchlike) for a string variable
>
> In my data I have a string variable "University", which lists
> university names. In some years the names are missing. Two other
> variables I've are "Professor" and "Year". The same "Professor" and
> "University" can occur multiple times in a year.
>
> The problem I have is that there are quite a few University names that
> are missing. What I want to do is to replace as many missing
> University names as possible, by assuming that: when a professor is
> linked to a university at least once in a year, she is linked to the
> same university during that year - so the missing university name when
> her name occurs again in the same year can be replaced (why there are
> missing university names is a complicated story:)).
>
> Any suggestion would be appreciated.
>
> Best,
> JJ
>
> I tried the following in Stata (it's foolish, I know):
>
> bysort year professor: egen University_all=mean(University)
>
> But I get the warning "type mismatch".
> *
> * 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/
>
>
> *
> * 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/
>
*
* 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/
*
* 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/
