How can i keep the results of for loop iteration in every step

I am trying to calculate a sum series. Series upper limit chance btw 4:2:16 and i want to keep for loop iterations in an array cause i will make a plot N vs Stot.

syms j

for N=4:2:16

S(i)=(symsum(cos((20*pi*j)/(N+1)),j,0,N))

Stot=(2*pi/(N+1))*S;

double(Stot)

end

Answer 1

[KALYAN ACHARJYA]

use

slot(i)=(2*pi/(N+1))*S;

Example:

for i=1:10;
    k(i)=2+i;
end

Command Window

>> k

k =

       3     4     5     6     7     8     9    10    11    12

[Zuy]

But at the same time i want to chance upper limit of the sum of the series. How can i both chance the upper limit and keep all of the results in an array?

[KALYAN ACHARJYA]

Are you looking for this one

slot(i)=slot(i)+...you can update this way also.

%%

N=4:2:16;
for i=1:length(N)
    %What is j here
    S(i)=(symsum(cos((20*pi*j)/(N(i)+1)),j,0,N(i)));
    Stot(i)=(2*pi/(N(i)+1))*S; 
    double(Stot(i)) 
end
plot(N,slot); %Note that both N and slot must have same length

[Zuy]

j is index sum is going from j=0 to j=N

[KALYAN ACHARJYA]

Replace N by N(i) inside loop, to change the upper limit during iteration.

Still, J is not clear for me?

Corrected code

N=4:2:16;
for i=1:length(N)
    %What is j here
    S(i)=(symsum(cos((20*pi*j)/(N(i)+1)),j,0,N(i)));
    Stot(i)=(2*pi/(N(i)+1))*S; 
    double(Stot(i)) 
end
plot(N,slot); %Note that both N and slot must have same length

[Zuy]

[Zuy]

i am using S1 formula. İ want to chance N like N=4:2:16 it is 10 in this case but at the same time i want to keep all of summation results in an array cause i will make a plot from them.