| Date: | Tue, 19 Mar 2002 11:10:02 -0500 |
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| Reply-To: | Howard_Schreier@ITA.DOC.GOV |
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| Sender: | "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU> |
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| From: | Howard_Schreier@ITA.DOC.GOV |
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| Subject: | Re: oscillator cruve |
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| Content-Type: | text/plain; charset=ISO-8859-1 |
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Tested code:
data out;
set in;
by aa2 notsorted;
if first.aa2 then countup + 1;
drop countup;
if first.aa2 or lag(first.aa2) then do;
aa3 = aa1;
aa4 = countup;
end;
run;
On Tue, 19 Mar 2002 16:30:00 +0800, =?big5?q?Morris?=
<soaring-cato@YAHOO.COM.TW> wrote:
>Dear List Members:
>
>I have some question,i want to creat the another one
>from the "aa1" and "aa2" variable (aa1 and aa2 are
>given)
>
>aa2 variable compose of "+"and "-" ,the aa3 variable
>that i want is always the first and second observation
>of "+" and "-" by each row group , and then creat aa4
>form aa3
>
>For example,
>
> aa1 aa2 aa3 aa4
>22.10 + 22.10 1
>22.05 + 22.05 1
>21.72 + . .
>22.63 - 22.63 2
>22.97 - 22.97 2
>22.90 - . .
>23.34 - . .
>23.46 - . .
>24.15 - . .
>25.28 + 25.28 3
>25.95 + 25.95 3
>25.89 - 25.89 4
>26.11 - 26.11 4
>25.71 - . .
>25.69 - . .
>25.31 + 25.31 5
>25.78 + 25.78 5
>25.53 + . .
>25.95 - 25.95 6
>25.91 - 25.91 6
>
>i was wondering if anyone could tell me how to do
>this by sas ~~!!
>
>many thanks,
>
>morris hu
>
>-----------------------------------------------------------------
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