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Base SAS 107

A raw data file is listed below:
RANCH,1250,2,1,Sheppard Avenue,"$64,000"
SPLIT,1190,1,1,Rand Street,"$65,850"
CONDO,1400,2,1.5,Market Street,"80,050"
TWOSTORY,1810,4,3,Garris Street,"$107,250"
RANCH,1500,3,3,Kemble Avenue,"$86,650"
SPLIT,1615,4,3,West Drive,"94,450"
SPLIT,1305,3,1.5,Graham Avenue,"$73,650"
The following SAS program is submitted using the raw data file as input:
data work.condo_ranch;
infile 'file-specification' dsd;
input style $ @;
if style = 'CONDO' or style = 'RANCH' then
input sqfeet bedrooms baths street $ price : dollar10.;
run;
How many observations does the WORK.CONDO_RANCH data set contain?
A. 0
B. 3
C. 5
D. 7
Click Comment link to get answer

31 comments:

  1. Anonymous9:35 AM

    then:

    D. 7

    RANCH......
    SPLIT......
    CONDO......
    TWOSTORY...
    RANCH......
    SPLIT......
    SPLIT......

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  2. can I have the explaination?
    Thank you

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  3. Its d) 7. If is not subsetting the dataset but providing a condition. if style =' ' | ' ' THEN input.

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  4. Could you Please explain in detail..
    Since, If and then say.. do when condition satisfied in this case condition will satisfy for 3

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  5. Anonymous5:52 PM

    Can Anybody explaine properly. this seems like a miracle

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  6. Anonymous1:21 PM

    RANCH 1250 2 1 Sheppard Avenue $64,000
    SPLIT
    CONDO 1400 2 1.5 Market Street $80,050
    TWOSTORY
    RANCH 1500 3 3 Kemble Avenue $86,650
    SPLIT
    SPLIT

    Output looks similar to this fashion. Since we have input style $ @; then comes if then.

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  7. Anonymous1:30 PM

    The above explanation in wrong. Will have only 3 observations

    RANCH 1250 2 1 Sheppard Avenue 64000
    CONDO 1400 2 1.5 Market Street 80050
    RANCH 1500 3 3 Kemble Avenue 86650

    I ran the code to confirm.

    ReplyDelete
    Replies
    1. Anonymous11:27 AM

      Even though other styles except CONDO,RANCH has missing value those were considered as an observation as the styles were present.

      Delete
  8. Answer is D.
    Reason being statement "input style $ @;" will hold input stream until next input statement. Program will read next input statement only if style is condo or ranch. But even when style is not condo or ranch when run statement is executed output will be written with just style variable having value and all others will be missing. Check it out using the program given below.

    data work.condo_ranch;
    infile datalines dsd;
    input style $ @;
    if style = 'CONDO' or style = 'RANCH' then
    input sqfeet bedrooms baths street $ price : dollar10.;
    datalines;
    RANCH,1250,2,1,Sheppard Avenue,"$64,000"
    SPLIT,1190,1,1,Rand Street,"$65,850"
    CONDO,1400,2,1.5,Market Street,"80,050"
    TWOSTORY,1810,4,3,Garris Street,"$107,250"
    RANCH,1500,3,3,Kemble Avenue,"$86,650"
    SPLIT,1615,4,3,West Drive,"94,450"
    SPLIT,1305,3,1.5,Graham Avenue,"$73,650"
    run;

    proc print;
    run;

    ReplyDelete
    Replies
    1. Anonymous9:37 PM

      Thanks...Now that is the way to explain. Hate the other ppls who don't mention any fruitful comments, but throw something which confuses.

      Delete
    2. thanks.. but..I thought,,, Because of "input style $ @", the raw data of next to 1st 'SPLIT' would be 1190, so next style would be '1190'... is that wrong?

      Delete
  9. Anonymous6:47 PM

    D for sure

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  10. Anonymous12:58 PM

    question though: #106 had also "input style $ @;" - the only difference I may note b/w these 2 is the THEN in the comparison line...

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  11. if we remove 'then' from the statement
    if style = 'CONDO' or style = 'RANCH' then

    only then the number of observations is 3, otherwise its 7

    ReplyDelete
    Replies
    1. Parineeti11:38 AM

      Thankyou! this helped a lot.

      Delete
  12. Anonymous4:38 PM

    the then in #107 gives all observations because no condition has been placed to subset the data. the absence of then in #106 is allowing the if statement act as a subsetting function in this case restricting the output to only 3.

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  13. Anonymous12:26 PM

    Why we are getting the outcome with 7 observations?
    As someone explained on earlier that @ sign will not let it move further and ends there, and it will not execute this statement,

    if style = 'CONDO' or style = 'RANCH' then

    and we are getting all style in the output.
    So the culprit is @ sign and which works as the stop sing and halts right there and we get the result with 7 obs.
    It is my understanding.
    sakar Sham

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  14. Anonymous11:07 AM

    We need to read the question carefully.

    20 birds came to a tree if a hunter kills 3 birds in one shot how many bird are in the tree?

    If we do plus and minus the answer will be 17, but rest fly away no birds are awaiting for the second shots.
    Here it is not asking the observations of the output but the observations in the data set before execution.
    I read that way and got answer 'D'.

    Thanks for reading may nasty comment.

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  15. Anonymous11:17 AM

    Someone is right about the trailing @ which will hold the " Style"
    But only tree of them has all the information it has in the statements.

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  16. D because only the input is affected by the IF statement; not the output.

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  17. Anonymous6:39 PM

    'then' makes all the difference. In this case, there are 2 input statements one before 'if' and one after 'if'. Second input statement reads only 3 obs. but first one reads all 7. Hence final output will contain 7 obs. in total with missing values for all the variables in the second input statement.

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  18. please anyone can give a better explanation to this its confusing me a lot

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  19. please anyone can give a better explanation to this its confusing me a lot

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  20. can u explain simple way to @ @@

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  21. if style = 'CONDO' or style = 'RANCH' then; : this statement gives 7 output

    and

    if style = 'CONDO' or style = 'RANCH';
    gives 3 output. please explain the logic behind

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  22. Anonymous6:41 AM

    the others there are with 'missing'

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  23. This comment has been removed by the author.

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