Re: st: help with conditional loop

[Shawn Bauldry <sbauldry@email.unc.edu>]

Works well.  Thanks.

-Shawn

Justin Smith wrote:
> sorry, small typo........
>
> the last line in that code should be:
>
> egen firstcontact = rowmin(x1-x30)
>
>
> Justin Smith
>
>
> On Sat, 05 Aug 2006 14:42:13 -0400
>  Justin Smith <smithjd5@univmail.cis.mcmaster.ca> wrote:
> JS>Hi Shawn:
> JS>
> JS>perhaps try this:
> JS>
> JS>foreach i of numlist 1/30 {
> JS>	qui replace x`i' = `i' if x`i' == 1
> JS>}
> JS>
> JS>gen firstcontact = rowmin(x1-x30)
> JS>
> JS>
> JS>This replaces the ones in your variables with the value of month,
> JS>then
> JS>takes the lowest one in the row.  Of course, you may need to change
> JS>those values back to ones if they are important.
> JS>
> JS>Hope this helps,
> JS>
> JS>Justin Smith
> JS>
> JS>
> JS>
> JS>On Sat, 05 Aug 2006 13:56:22 -0400
> JS> Shawn Bauldry <sbauldry@email.unc.edu> wrote:
> JS>JS>I think I have a fairly simple loop question that I can't seem to
> JS>JS>get my
> JS>JS>head around.
> JS>JS>
> JS>JS>I have a series of variables, say x1-x30, that correspond to
> JS>months
> JS>JS>in a
> JS>JS>program (a value of 1 indicates a person was present in the
> JS>program
> JS>JS>in a
> JS>JS>given month).  I simply want to find the first month a person
> JS>shows
> JS>JS>up.
> JS>JS>
> JS>JS>I tried the following, but it's not working and I'm not sure why.
> JS>JS>
> JS>JS>gen FirstContact = .
> JS>JS>local i = 0
> JS>JS>while FirstContact == . {
> JS>JS> 	local i = `i' + 1
> JS>JS> 	replace FirstContact = `i' if x`i' == 1
> JS>JS>}
> JS>JS>
> JS>JS>The code runs without error, but does not find the correct first
> JS>JS>month
> JS>JS>someone shows up.  For example, in one case I have:
> JS>JS>
> JS>JS>x1 = ., x2 = 1, x3 = 1, x4 = 1, x5 = 1, x6 = 1, ... and it
> JS>returns
> JS>JS>FirstContact = 5.
> JS>JS>
> JS>JS>
> JS>JS>Any thoughts on how to make this code work or better code are
> JS>much
> JS>JS>appreciated.
> JS>JS>
> JS>JS>
> JS>JS>Thanks,
> JS>JS>Shawn
> JS>JS>*
> JS>JS>*   For searches and help try:
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> JS>
> JS>Justin Smith
> JS>PhD Candidate
> JS>Department of Economics
> JS>McMaster University
> JS>Phone: (905) 962-0353
> JS>E-mail: smithjd5@mcmaster.ca 
> JS>*
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>
> Justin Smith
> PhD Candidate
> Department of Economics
> McMaster University
> Phone: (905) 962-0353
> E-mail: smithjd5@mcmaster.ca 
> *
> *   For searches and help try:
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*
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