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radha009
Quartz | Level 8

i have data  with columns Names (win ,unix,sas,sep..etc) and data with yes and no. i want to delete the column without giving the column name.(ex: if sas column has all 'No' data).'

 

Thank you

1 ACCEPTED SOLUTION

Accepted Solutions
gamotte
Rhodochrosite | Level 12

Hello,

 

data have;
    input col1 $ col2 $ col3 $;
cards;
Yes No No
No No Yes
Yes No Yes
;
run;

data NULL_;
    set have end=eof;
    array cols(*) col:;
    array nos(3)_TEMPORARY_;

    do i=1 to dim(cols);
        if strip(cols(i))="No" then nos(i)+1;
    end;

    if eof then do;
        call execute('data want; set have;');
        if max(of nos(*))=_N_ then do;
            call execute('drop');
            do i=1 to dim(cols);
                if nos(i)=_N_ then do;
                    call execute(vname(cols(i)));
                end;
            end;
        end;
call execute('; run;');
    end;
run;

View solution in original post

3 REPLIES 3
LinusH
Tourmaline | Level 20
This probably need that you first query the table, and based on that issue your drop column statement. Macro logic is what I see.

There have been a lot of similar question on the communities, especially when all column uses are missing. Do a search and youbwould be able to learn from those.
Data never sleeps
gamotte
Rhodochrosite | Level 12

Hello,

 

data have;
    input col1 $ col2 $ col3 $;
cards;
Yes No No
No No Yes
Yes No Yes
;
run;

data NULL_;
    set have end=eof;
    array cols(*) col:;
    array nos(3)_TEMPORARY_;

    do i=1 to dim(cols);
        if strip(cols(i))="No" then nos(i)+1;
    end;

    if eof then do;
        call execute('data want; set have;');
        if max(of nos(*))=_N_ then do;
            call execute('drop');
            do i=1 to dim(cols);
                if nos(i)=_N_ then do;
                    call execute(vname(cols(i)));
                end;
            end;
        end;
call execute('; run;');
    end;
run;

radha009
Quartz | Level 8

Perfect. thanks a lot.

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