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Date:         Sat, 14 Dec 1996 17:17:17 GMT
Reply-To:     David Kurzman <DAVEK@VAX2.CONCORDIA.CA>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From:         David Kurzman <DAVEK@VAX2.CONCORDIA.CA>
Organization: j%nki~w RJ3M-26XPLZ8L-BFGD44CT-1EA6BC82
Subject:      Missing vs. Sysmis
Content-Type: text/plain; charset=us-ascii

Hi there,

Ass I create a new data set and use a previous one I began to wonder wheteher it is better to use a code for missing data (e.g., -99) or simply leave it blank and later add the

set blanks = -99 (missing values all (-99)

is there any reason why I would want to initially code it as -99 rather than leave it blank?

This is especiaiily true given, a data set that I have been given in which the data entry invloves fields of different length such that the missing data were enetered as 99, 999, 9999 .... and there are now many many lines simply to define the missing data.

Also, when new data were entered, they decided to now enter the additional data by simply leaving missing data fileds blank. does this combination of defining missing data create problems?

Lastly, Is there a way to recode all missing data to a single code in one step (e.g., recode all missing to -9)?

Thanks,

David Kurzman =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= " David Kurzman | " " Department of Psychology | " " Concordia University | " " e-mail: DAVEK@VAX2.CONCORDIA.CA | " " s-mail: 6030 Cote St. Luc Rd. #202 Montreal, PQ H3X 2G7 " " HTTP://VAX2.CONCORDIA.CA/~DAVEK " =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= NEW ADDRESS AS OF SEPTEMBER 1, 1996 915 Elmsmere Rd. #504 Gloucester, Ontario K1J 8H8 1-613-744-6409


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