How to visualize intersection of patients among multiple groups

Abishekaa — Sun, 29 Mar 2026 22:35:44 GMT

Is there some way to visualize and calculate intersections among multiple groups? Here is sample data (my data has 7 groups). I want to visualize interactions among all groups to show all the possible results like - 1 patient is in both groups 1 & 2, 2 patients are in both groups 1 & 3, 1 patient is in groups 1,2 &3. Is there some nice way to visualize this? If not, at least a way to calculate and present all the number of participants intersecting at all possible group combinations?

Pt	Group1	Group2	Group3
1	0	0	0
2	0	0	0
3	1	1	1
4	1	0	1
5	1	0	0
6	0	1	0
7	0	1	0
8	0	1	1
9	0	1	1
10	0	1	1

Re: How to visualize intersection of patients among multiple groups

Ksharp — Mon, 30 Mar 2026 07:06:24 GMT

How about this one ?

data have;
infile cards expandtabs truncover;
input Pt	Group1	Group2	Group3;
cards;
1	0	0	0
2	0	0	0
3	1	1	1
4	1	0	1
5	1	0	0
6	0	1	0
7	0	1	0
8	0	1	1
9	0	1	1
10	0	1	1
;


data temp;
set have;
length label $ 80;
array g{*} group1-group3;
array x{3};  /*3 is the number of group*/
n=dim(x);nsubs=2**n;k=-1;
do i=1 to nsubs;
rc=graycode(k, of x{*});
 if k>1 then do;  /*only pick up the number of group which is greater than 1*/
   sum=0;
   do j=1 to n;
     sum+g{j}*x{j};
   end;
   if sum=k then do;label=cats(of x{*});output;end;
 end;
end;
keep label;
run;

proc freq data=temp order=freq noprint ;
table label/out=want;
run;

proc sgplot data=want;
hbar label /response=count datalabel;
yaxis label='Group';
xaxis label='the number of patient';
run;

topic How to visualize intersection of patients among multiple groups in SAS Programming

How to visualize intersection of patients among multiple groups

Re: How to visualize intersection of patients among multiple groups