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- Message-ID: <SAS-L%92110913035411@VM.UCS.UALBERTA.CA>
- Newsgroups: bit.listserv.sas-l
- Date: Mon, 9 Nov 1992 12:00:00 PST
- Reply-To: Melvin Klassen <KLASSEN@UVVM.BITNET>
- Sender: "SAS(r) Discussion" <SAS-L@UGA.BITNET>
- From: Melvin Klassen <KLASSEN@UVVM.BITNET>
- Subject: Re: follow up question
- Comments: To: Uma S <SUMA@CLEMSON.BITNET>
- Lines: 30
-
- On Mon, 09 Nov 92 14:48 EST, Uma <SUMA@CLEMSON> wrote:
- > My remaining problem is just this.
- > I used SAS to read a (1st) dataset which has some missing values.
-
- See page 546 ("Special missing values") of "SAS(r) User's Guide: Basics,
- Version 5 Edition" and page 548 ("Magnitudes of missing values")
- to see how SAS stores missing values inside a SAS dataset.
-
- > I then used SAS to write a 2nd data set in real binary format.
-
- See page 524 of the same manual for the "RBw.d" format. It states:
-
- Real binary is the most-efficient format for representing numeric values,
- since SAS already represents numbers this way, and no conversion is needed.
-
- Therefore, the bits in the external file will match-up, one-for-one,
- with the internal values in the SAS dataset.
-
- > I then used SAS once again to read the 2nd dataset in real binary format,
- > and then performed some ratio calculations such as a=b/c. I am wondering
- > if when SAS reads the 2nd dataset, it will correctly recognize the missing
- > values for what they are represented in real binary.
-
- Since "no conversion is needed",
- there is no possibility for SAS to do the "wrong" thing.
-
- So, my guess is that it will work.
-
- Why not try a small program, and a small dataset,
- and see if SAS does what you expect?
-