Stor data in a vector

For every loop z i want to store my data so that JJ doesnt just become the reslut of z=40, i want JJ to be a vector(1,1000), now i only get JJ to be a vector of (1,25) from the last z loop.

p_t2=1:1000 pt2=1:40

for z=1:40 for v=1:25 XX=p_t2(v)./pt2; JJ(v)=sum(XX); end p_t2(1:25)=[]; pt2(:,1)=[]; end

thank you in advance

Answer 1

[Iman Ansari]

p_t2=1:1000 
pt2=1:40
JJ=[];
for z=1:40 
    for v=1:25 
        XX=p_t2(v)./pt2; 
        JJ=[JJ sum(XX)]; 
    end
    p_t2(1:25)=[]; 
    pt2(:,1)=[]; 
end

[Lukas]

thank you for a very quick answer.

Answer 2

[Lukas]

The code didnt look as i wanted it, sorry...

p_t2=1:1000
pt2=1:40

 p_t2=1:1000
pt2=1:40

for z=1:40
        for v=1:25        
            XX=p_t2(v)./pt2;
            JJ(v)=sum(XX);
        end
    p_t2(1:25)=[];
    pt2(:,1)=[];
end

Answer 3

[Mark]

If you want preallocation:

p_t2=1:1000;
pt2=1:40;
JJ=zeros(1,1000);

for z=1:40
  for v=1:25
    XX=p_t2(v)./pt2;
    JJ((z-1)*25+v)=sum(XX);
  end
  p_t2(1:25)=[];
  pt2(:,1)=[];
end

Answer 4

[Lukas]

Thank you for the quick answers, however now I have an other problem..

How do I in a spimle way adjust it to be able to hadel a matrix as input, for example if:

p_t2=rand(2,1000) 
pt2=rand(2,40)
JJ=[];
for z=1:40 
    for v=1:25 
        XX=p_t2(v)./pt2; 
        JJ=[JJ sum(XX)]; 
    end
    p_t2(1:25)=[]; 
    pt2(:,1)=[]; 
end

I want the output JJ be a matrix with dimension (2,1000)

[Iman Ansari]

clear;
p_t2=rand(2,1000);
pt2=rand(2,40);
JJ=[];
for z=1:40 
    for v=1:25 
        XX=bsxfun(@rdivide,p_t2(:,v),pt2); 
        JJ=[JJ sum(XX,2)]; 
    end
    p_t2(:,1:25)=[]; 
    pt2(:,1)=[]; 
end