> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Clive Nicholas
> Sent: Sunday, December 12, 2004 8:25 PM
> To: [email protected]
> Subject: st: Creating a dummy variable that 'marks out' useless cases
>
> All,
>
> Exclusive to Statalist: the latest instalment of "Clive's Serendipitous
> Adventures With His Unwieldy Dataset".
>
<snip>
>
> As you can see, -mark- is 0 when _either_ -conch- or -edconch- is missing
> _or_ when -marker- is 0 (or, indeed, both). I thought this would be a dead
> simple task (perhaps it really is), but all the commands I've issued so
> far aren't executing what I want. For example:
>
<snip>
Clive,
How about this:
. mark mark2 if ed != .
. replace mark2 = 0 if co == .
(0 real changes made)
. replace mark2 = 0 if marker == 0
(6 real changes made)
. cl, noobs
pano conch edconch marker mark mark2
436 2.08482 1.042244 1 1 1
436 2.551552 23.68557 0 0 0
436 1.171085 18.44246 0 0 0
436 2.551552 28.24039 0 0 0
436 1.171085 23.11701 0 0 0
436 9.708897 6.17593 0 0 0
436 9.708897 9.517298 0 0 0
437 2.786781 . 1 0 0
437 .6094589 . 1 0 0
437 12.96428 . 1 0 0
437 1.095558 . 1 0 0
438 7.136993 21.97673 1 1 1
438 .5475883 5.041264 1 1 1
438 2.488335 .6113586 1 1 1
438 6.498318 11.1867 1 1 1
438 .7604446 21.50825 1 1 1
439 6.331062 1.482658 1 1 1
439 1.661823 11.79961 1 1 1
439 2.188976 3.028099 1 1 1
439 6.502392 17.35701 1 1 1
439 3.512476 8.189182 1 1 1
Scott
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