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vector or matrix in matlab

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Mbqmbq

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Hello all
I have a vector in matlab x=(a1 a2 a3 .... a100) and I want to make y=(b1 b2 b3 ... b20)
where b1=a1+a2+a3+a4+a5
and b2=a6+a7+a8+a9+a10
and .....b20=a96+a97+a98+a99+a100
please help me ,
 

try this m-file code:

clear;
x=linspace(1,100);
y=zeros(1,20);
j=1;
for i=1:20
for k=j:j+4
y(i)=y(i)+x(k);
end
j=j+5;
end

instead of x put your values.
 

If u want indexing based approach for your problem

step = 5;
y=[sum(x(1,1:step)) sum(x(1,step+1:2*step)) ...... ]

or you could use loop also but Pulkit command is concise and elegant.
 

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