My SAS Tutorials

Tuesday 2 July 2013

SAS INTERVIEWS CONCEPTUAL QUESTIONS XII

We have a SAS data set TEST

data test;
  input Cust_ID $ visit $ visdt date7.;
  format visdt date7.;
  cards;
001 uns 01jun13
001 visit1 02jun13
001 visit2 03jun13
001 uns 04jun13
001 uns 05jun13
001 visit3 06jun13
001 uns 07jun13
001 uns 08jun13
001 uns 01jun13
001 visit4 02jun13
001 visit5 03jun13
001 uns 04jun13
001 uns 05jun13
001 visit6 06jun13
001 uns 07jun13
001 uns 08jun13
;
run;


We want the output like:

                                 Cust_ID   Vist         visdt       Visitseq

                                       001    uns       01JUN13    0.1
                                       001    visit1    02JUN13    1.0
                                       001    visit2    03JUN13    2.0
                                       001    uns       04JUN13    2.1
                                       001    uns       05JUN13    2.2
                                       001    visit3    06JUN13    3.0
                                       001    uns       07JUN13    3.1
                                       001    uns       08JUN13    3.2
                                       001    uns       01JUN13    3.3
                                       001    visit4    02JUN13    4.0
                                       001    visit5    03JUN13    5.0
                                       001    uns       04JUN13    5.1
                                       001    uns       05JUN13    5.2
                                       001    visit6    06JUN13    6.0
                                       001    uns       07JUN13    6.1
                                       001    uns       08JUN13    6.2

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10 comments:

  1. sam sridar10 July 2013 at 11:13

    This comment has been removed by the author.

    ReplyDelete
  2. sam sridar10 July 2013 at 11:20

    data test2;
    set test;
    freq=0;
    do freq=1 to 16;
    if visit ="uns" then do;
    freq=freq+0.1;
    end;
    else if visit in ("visit1","visit2","visit2","visit3","visit4","visit5","visit6") then do;
    freq=(freq+1);
    freq=floor(freq);
    end;
    output;
    end;
    run;

    i tried the above.. its not working

    ReplyDelete
  3. sam sridar11 July 2013 at 00:42

    atlast i have found the closest answer:
    data test2;
    set test;

    retain visiteq 0;
    if visit ne "uns" then do;
    visiteq=floor(visiteq+1);
    end;
    visiteq=visiteq+0.1;
    run;

    ReplyDelete
  4. Anonymous30 July 2013 at 15:17

    data test2;
    set test;
    if substr(visit,1,1)='v' then visitseq=floor(visitseq+1);
    else if substr(visit,1,1)='u' then visitseq+0.1;
    run;

    ReplyDelete
  5. Unknown21 August 2013 at 16:43

    data test1;
    set test;
    if visit='uns' then visitseq+0.1;
    else if indexc(visit,'v0123456789') > 0 then visitseq=input(compress(visit,'0123456789','K'),??best.);

    run;

    ReplyDelete
  6. Unknown21 August 2013 at 16:44

    data test1;
    set test;
    if visit='uns' then visitseq+0.1;
    else if indexc(visit,'v0123456789') > 0 then visitseq=input(compress(visit,'0123456789','K'),??best.);

    run;

    ReplyDelete
  7. Unknown19 September 2013 at 18:06

    data ra1(drop=freq freq_);
    set test;
    if visit='uns' then freq+0.1;
    else freq= .;
    if visit ne 'uns' then freq_+1;
    visitseq=put(sum(freq_,freq),8.1);
    run;

    ReplyDelete
  8. Unknown9 October 2013 at 11:45

    data test;
    input Cust_ID $ visit $ visdt date7.;

    retain visitseq 0;
    drop c;
    c=substr(visit,length(visit),1);
    if(upcase(c)=lowcase(c))then visitseq=c;
    else visitseq=visitseq+.1;

    format visdt date7.;
    cards;
    001 uns 01jun13
    001 visit1 02jun13
    001 visit2 03jun13
    001 uns 04jun13
    001 uns 05jun13
    001 visit3 06jun13
    001 uns 07jun13
    001 uns 08jun13
    001 uns 01jun13
    001 visit4 02jun13
    001 visit5 03jun13
    001 uns 04jun13
    001 uns 05jun13
    001 visit6 06jun13
    001 uns 07jun13
    001 uns 08jun13
    ;
    run;

    proc print;
    run;

    ReplyDelete
  9. Jag13 October 2013 at 10:54

    Please try the below code,

    data test;
    input Cust_ID $ visit $ visdt date7.;
    visitn=input(compress(visit,,'kd'),2.);
    order=_n_;
    format visdt date7.;
    cards;
    001 uns 01jun13
    001 visit1 02jun13
    001 visit2 03jun13
    001 uns 04jun13
    001 uns 05jun13
    001 visit3 06jun13
    001 uns 07jun13
    001 uns 08jun13
    001 uns 01jun13
    001 visit4 02jun13
    001 visit5 03jun13
    001 uns 04jun13
    001 uns 05jun13
    001 visit6 06jun13
    001 uns 07jun13
    001 uns 08jun13
    ;
    run;

    proc sort data=test;
    by order;
    run;

    data test_;
    set test;
    by order;
    retain seq 0.1;
    if visit ne "uns" then do;
    if first.order then seq=visitn;
    end;
    run;

    proc sort data=test_;
    by seq;
    run;

    data new;
    set test_;
    by seq;
    retain visitseq;
    if first.seq then visitseq=seq;
    else visitseq+0.1;
    run;

    Thanks,
    Jagadish

    ReplyDelete
  10. Unknown2 January 2014 at 19:03

    data test2;
    retain t 0;
    retain v 0;
    set test;
    if visit="uns" then
    do;
    t=t+0.1;
    visiteq=v+t;
    end;
    else
    do;
    v=v+1;
    visiteq=v;
    end;
    drop t v;
    run;

    ReplyDelete

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