Repeat resampling with replacement process several times

Hello,

I have the below code for resampling with replacement.

res1 = [];
res2 = [];
 
 % centerd matrix size:2X7
cen1=centered(1,:); 
cen2=centered(2,:);

for j=1:7
    res1_temp=cen1(randi(7,1));
    res1= [res1 res1_temp];
    %    
    res2_temp=cen2(7,1));
    res2= [res2 res2_temp];      
end   
res_total=[res1; res2]; % 2X7

Now I have to repeat this process 170 times because centered matrix size is 170X7. That is, must have

re1=[];
res2=[];
.......
res170[];
......
res_total=[res1;res2,.....
res170];    

and the res_total should be 170X7. How can I as easy as possible?

Answer 1

[VBBV]

res1 = [];
res2 = [];
centered = rand(170,7) 

centered = 170×7

0.6558 0.6340 0.7993 0.3911 0.8091 0.8170 0.1949 0.9049 0.7951 0.6934 0.1121 0.0001 0.1897 0.4469 0.3652 0.0276 0.8570 0.7298 0.7666 0.3056 0.2107 0.9367 0.4151 0.2733 0.7628 0.5691 0.6688 0.8626 0.6983 0.4839 0.8889 0.4091 0.7523 0.3580 0.3595 0.9022 0.9422 0.6523 0.8360 0.9986 0.3244 0.6809 0.0640 0.9521 0.1633 0.6885 0.4294 0.0889 0.3304 0.5681 0.7248 0.8518 0.8903 0.8060 0.3555 0.2800 0.3060 0.6259 0.1338 0.7183 0.2156 0.2771 0.4144 0.2730 0.7219 0.0963 0.6360 0.6344 0.2485 0.8829

 % centerd matrix size:2X7
% cen1=centered(1,:); 
% cen2=centered(2,:);

for j=1:85
    cen1 = centered(j,:);
    res1(j,:) = cen1;
    %    
    cen2 = centered(j+85,:);
    res2(j,:) = cen2;      
end   
res_total=[res1; res2] % 2X7

res_total = 170×7

0.6558 0.6340 0.7993 0.3911 0.8091 0.8170 0.1949 0.9049 0.7951 0.6934 0.1121 0.0001 0.1897 0.4469 0.3652 0.0276 0.8570 0.7298 0.7666 0.3056 0.2107 0.9367 0.4151 0.2733 0.7628 0.5691 0.6688 0.8626 0.6983 0.4839 0.8889 0.4091 0.7523 0.3580 0.3595 0.9022 0.9422 0.6523 0.8360 0.9986 0.3244 0.6809 0.0640 0.9521 0.1633 0.6885 0.4294 0.0889 0.3304 0.5681 0.7248 0.8518 0.8903 0.8060 0.3555 0.2800 0.3060 0.6259 0.1338 0.7183 0.2156 0.2771 0.4144 0.2730 0.7219 0.0963 0.6360 0.6344 0.2485 0.8829

[stelios loizidis]

I understood what you suggested above, but I tried to do it like this:

for j=1:170
res_total(j,:)=centered(randi(j,:))
end

But it does not work.

[VBBV]

May be you mean this instead

% res1 = [];
% res2 = [];
centered = rand(170,7); 
 
for j=1:170
     res_total(j,:)=centered(randi(j),:);  
end
res_total

res_total = 170×7

0.4400 0.2235 0.8825 0.6564 0.4160 0.3429 0.0489 0.4400 0.2235 0.8825 0.6564 0.4160 0.3429 0.0489 0.0892 0.7041 0.9296 0.5553 0.7713 0.8969 0.5811 0.4400 0.2235 0.8825 0.6564 0.4160 0.3429 0.0489 0.0892 0.7041 0.9296 0.5553 0.7713 0.8969 0.5811 0.0892 0.7041 0.9296 0.5553 0.7713 0.8969 0.5811 0.1172 0.3186 0.5401 0.9210 0.5579 0.0420 0.7755 0.7331 0.6314 0.0854 0.2315 0.7209 0.7810 0.0977 0.8592 0.8540 0.0853 0.2848 0.9761 0.5497 0.2875 0.7331 0.6314 0.0854 0.2315 0.7209 0.7810 0.0977

[stelios loizidis]

It works!!!! Thanks for the valuable help!!!!