MATLAB: How do i assign an array to i

arrayMATLAB

i want to make an array in choosing PP. 
RS=
1	28702	1	7	5	2	3	9	8	4	11	6	10	12
2	28764	9	2	7	6	3	1	4	5	12	10	11	8
3	36438	4	1	9	2	10	7	12	8	6	3	5	11
4	37192	12	7	10	8	1	9	4	6	5	11	3	2
5	41182	9	4	10	7	1	3	6	8	5	2	11	12
6	43442	4	10	2	3	1	5	6	12	9	8	11	7
7	48650	8	7	1	4	9	10	2	11	12	3	5	6
8	51154	12	2	8	1	3	5	7	4	11	9	6	10
9	51412	10	6	4	2	7	1	8	5	3	12	9	11
10	52796	8	2	4	5	3	6	1	7	12	11	9	10
11	54018	5	4	2	8	7	10	11	3	6	12	1	9
12	65420	6	7	2	8	3	4	12	1	11	9	10	5
cp=0.4;                 % Crossover Percentage
np=2*round(cp*r/2);  % Number of Offsprings (Parents)
valp=np/2; 
v=valp;
n1=length(RS(:,1));
PP=RS([1:v,n1-v+1:end],3:end);   
    
% for cycle crossover used p1, p2,p3,p4 saja
    p1 = PP(1,:);
    p2 = PP(2,:);
    p3 = PP(3,:);
    p4 = PP(4,:);
instead of doing it manually, p1, p2, p3 and p4.. i want it to be an array so that whevever u change the value i didnt have to write it manually
however i got an error "Unable to perform assignment because the indices on the left side are not compatible with the size of the right side" when i do it like 
   
 for i=1:np
     p(i) = PP (i,:); 
 end
below is the result of PP
 PP =
1. 12	  3	9	11	6	10	4	7	5	1	8	2
2.  2	  6	9	8	10	11	5	4	12	3	1	7
3. 10	  4	2	12	3	8	9	5	1	6	11	7
4.  8	  1	10	12	5	9	7	6	11	3	4	2

Best Answer

Don't think of naming variables dynamically (https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval) use cell instead:
P=cell(1,np); % preallocate
for i=1:np
     P{i} = PP(i,:); 
end
celldisp(P)
vertcat(P{:}) % double array
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