topic Rotating a data set in SAS Programming

Rotating a data set

mona4u — Mon, 02 Apr 2018 18:51:47 GMT

Hi,

I'm trying to rotate my data and this is my first time doing this.

Please edit my code if you can

this is the data set that I have

Obs	case_assigned	Time_points_read	Time_points_complete	Readable_Time_Points	Time_Points_Pending	off_study	off_study_Total
1	5	53	1360	15	15	0	0

and this is the result that I got

Obs	case_assigned	Time_points_read	Time_points_complete	Readable_Time_Points	Time_Points_Pending	off_study	off_study_Total	i	vv	vs
1	5	53	1360	15	15	0	0	1	5	Cases Assigned
2	5	53	1360	15	15	0	0	2	53	Cases Assigned
3	5	53	1360	15	15	0	0	3	1360	Cases Assigned
4	5	53	1360	15	15	0	0	4	15	Cases Assigned
5	5	53	1360	15	15	0	0	5	15	Cases Assigned
6	5	53	1360	15	15	0	0	6	0	Cases Assigned
7	5	53	1360	15	15	0	0	7	0	Cases Assigned

and this is the aim

vv	vs
5	Cases Assigned
53	Time_points_read
1360	Time_points_complete
15	Readable_Time_Points
15	Time_Points_Pending
0	off_study
0	off_study_Total

and this is my code

data rotate;
set table4;
array var{7} case_assigned Time_points_read Time_points_complete Readable_Time_Points
Time_Points_Pending off_study off_study_total;
do i=1 to 7;
if var{7} ne . then do;
vv=var{i};
vs= ("Cases Assigned" );
output;
end;
end;
run;

Re: Rotating a data set

ballardw — Mon, 02 Apr 2018 22:07:56 GMT

Do you want a data set for further manipulation or a report for people to read?

Untested but you were close with the data :

data rotate;
   set table4;
   array var{7} case_assigned Time_points_read Time_points_complete Readable_Time_Points
   Time_Points_Pending off_study off_study_total;
   do i=1 to 7;
      if var{7} ne . then do;
         vv=var{i};
         vs= vname(var{I});
         output;
      end;
   end;
   keep vv vs;
run;

The keep says to only have the variable vv and vs in the output data set.

The VNAME function will return the name of the variable the array index points to.

You really should specify the length of the VS variable before use as many times the length result for functions will default to either largish values (200 in the case of vname) or possibly to short because of the first value you assign isn't the longest.

Re: Rotating a data set

ChrisNZ — Mon, 02 Apr 2018 22:49:38 GMT

Indeed, proc transpose data=table4 out=rotate(rename=(_NAME_=VS COL1=VV)); run; does exactly what you want.

Re: Rotating a data set

ChrisNZ — Tue, 03 Apr 2018 20:10:46 GMT

@dgritt scroll right.. . 🙂