how to use loop for sum without using cumsum?

i want sum without using 'cumsum'

can i get s with loop:

s1 = x1;

s2 = x1+x2;

s3 = x1+x2+x3

s4= x1+x2+x3+x4; and so on upto s100

s = [s1;s2;s3;s4......;s100]

Answer 1

[Aakash]

You can do this:

%sample data

x = [1, 2, 3, 4];

n = length(x);

s = zeros(n, 1); % Initialize s as a vector of zeros

for i = 1:n

s(i) = sum(x(1:i)) % Calculate the sum of the first i elements of x

end

or

s = zeros(n, 1); % Initialize s as a vector of zeros

s(1)=x(1);

for i = 2:n

s(i) = x(i)+s(i-1) % Calculate the sum of the first i elements of x

end