Roger Newson
> I am trying to use -sortpreserve- in Stata 7 and Stata 8
> under Windows
> 98/SE. However, there is one problem. My -sortpreserve-
> programs do not
> seem to be generating a -`sortindex'- temporary variable, as -[P]
> sortpreserve- says they should. (A simple example under Stata
> 8 is given
> below.) Why should this be the case?
>
> Best wishes (and thanks in advance)
>
> Roger
>
> . prog def nutz1,sortpreserve
> 1. version 8.0
> 2. disp as text "Sort index var: |`sortindex'|"
> 3. sort `sortindex'
> 4. end
>
> . nutz1
> Sort index var: ||
> varlist required
> r(100);
There is a typo in the manual under [P] sortpreserve (p. 402 under section
'How sortpreserve works'). A leading underscore is missing from the macro
name used for the sortpreserve variable. References to `sortindex' should
be replaced by `_sortindex' everywhere. The following will work:
prog def nutz1,sortpreserve
version 8.0
disp as text "Sort index var: |`_sortindex'|"
sort `_sortindex'
end
. nutz1
Sort index var: |__000000|
Patrick Joly
[email protected]
[email protected]
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