Base SAS array

[singhsahab]

Dear Members,

I've a dataset which contain missing and non missing values. The "Spec" dataset contains the information about first dataset. I wanted to check missing values variable and wanted to create one more dataset which should contain the original dataset with one extra variable . I got stuck how i can concatenate variable names.  

Output wanted:

a b c Missing_Details

1 . a1 B is missing
. 2 b2 A is missing
. . A is missing,B is missing,C is missing
1 2 c3

data test;
infile datalines;
input a b c $1.;
datalines;
1 . a
. 2 b
. .  
1 2 c
;
run;

data Spec;
input Req  name $ TYPE $;
datalines;
0 a NUM
0 b NUM
0 C CHAR
;
run;

proc sql;
select name into :name1 SEPARATED by ' ' from spec WHERE TYPE EQ 'NUM';
select name into :name_CH1 SEPARATED by ' ' from spec WHERE TYPE EQ 'CHAR';
quit;

OPTIONS MPRINT MLOGIC SYMBOLGEN;

DATA _NULL;
SET TEST;
ARRAY ARR[*] &name1;
array arr1[*] &name_ch1;
DO J=1 TO dim(ARR);
  IF MISSING(ARR[J]) THEN MISS='MISSING';
 END; 
 DO i=1 TO dim(arr1);
  IF MISSING(ARR1[i]) THEN MISS='MISSING';
END;
RUN;

Thank you everyone in advance !! 

[gamotte]

Hello,

data test;
    infile datalines;
    input a b c $1.;

    array n _NUMERIC_;
    array ch _CHARACTER_;

    length miss $200;

    do over n;
        if missing(n) then miss=catx(' ', miss, vname(n), 'is missing');
    end;

    do over ch;
        if missing(ch) then miss=catx(' ', miss, vname(ch), 'is missing');
    end;

    datalines;
1 . a
. 2 b
. . . 
1 2 c
;
run;

[Patrick · Accepted solution]

Using what you've posted here a solution approach. 

DATA want(drop=i j);
  SET TEST;
  ARRAY ARR[*] &name1;
  array arr1[*] &name_ch1;
  length Missing_Details $120;

  DO J=1 TO dim(ARR);
    IF MISSING(ARR[J]) THEN
      Missing_Details=catx(',',Missing_Details,vname(ARR[J]));
  END;

  DO i=1 TO dim(arr1);
    IF MISSING(ARR1[i]) THEN
      Missing_Details=catx(',',Missing_Details,vname(ARR1[i]));
  END;
RUN;
proc print data=want;
run;

N.B: The length of variable Missing_Details must be sufficient to hold all the variable names in case they are all missing (=32 characters for the var name plus 1 character for the comma per variable).