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st: RE: RE: RE: RE: Saving different parts of a dataset using foreach
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: RE: RE: RE: Saving different parts of a dataset using foreach
Date
Tue, 31 Aug 2010 11:15:50 +0100
Agreed; and also a smidgen more efficient.
Nick
[email protected]
Martin Weiss
So if only Matthew had used the word "numlist" instead of "year", his syntax
would have been legal:
***********
foreach i of numlist 2002/2008 {
di `i'
}
***********
-forvalues- still looks simpler to me...
Nick Cox
In other words, only certain keywords may appear after -of-. The relevant
syntax is
foreach <lname> of <listtype> <list> {
commands referring to `lname'
}
-- and the only allowed -listtype-s are
local global varlist newlist numlist
Nick
[email protected]
Martin Weiss
Look at the -foreach- syntax diagram, or read up on it in NJC`s
http://www.stata-journal.com/sjpdf.html?articlenum=pr0005. Even better:
-forvalues-
***********
forv year = 2002/2008{
di `year'
}
***********
Matthew Krauchunas
I am working with panel data and I need to separate the data by year,
run some commands, and then append it. The BY command will not work
with this particular command so that is not an option. I have tried
the following commands and it keeps telling me invalid syntax. Does
anyone see an error here or have a suggestion(s)?
use "G:\Merged_Joined_Appended
files\final_oshpd_oscar_merge_w_dp_first_set_variables"
sort year
cd g:\Years
preserve
foreach i of year 2002/2008 {
keep if year == `i'
* run my commands here *
save year_`i'
restore, preserve
}
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