I can reconcile the apparent difference.
Eric is lucky that both -recode- and -tostring- accept varlists with
wildcards.
However, note that -foreach- in his code is _not_ setting up a loop over
the variables implied by the wildcard.
Rather, -foreach- is looping once, over its single item -V*-.
So, my initial criticism was wrong in so far as Eric's code will work,
but perhaps not for the reason he thought.
Nick
[email protected]
Nick Cox
Well, it does not work for me. (I do know what a wildcard like V* means
in Stata. The point is that you need -of var- to make explicit that you
have one.)
. clear
. set obs 1
obs was 0, now 1
. gen v1 = 1
. gen v2 = 2
. gen v3 = 3
. foreach v in V* {
2. d `v'
3. }
variable V* not found
r(111);
Nick
[email protected]
Eric A. Booth
On Apr 29, 2009, at 12:03 PM, Nick Cox wrote:
> I have various comments on this code.
>
> 1. -foreach x in V*- won't work. Eric is probably thinking of
> -foreach x of var V*- but in this case -foreach v in V1 V2 V3- takes
> no more thought.
>
-foreach x in V*- works for fine for me. It loops over all the
variables V1-V3.
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