Summing the values with looping

% i need to find the "Q" variable for every instance of "n" and divide those values by "Pr"  
clear all
clc;
n=[1:1:50]
B=7.5 % angle value
%Q= (1+2*(cos(n1*B))^(5/2)+2*(cos(n2*B)^(5/2) + ... ); --> this is an
%example of how iterations should be in short; "1+2*(cos(n*B))^(5/2)"
Pr= 395
P1= Pr/Q

[Stephen23]

Duplicate:

https://www.mathworks.com/matlabcentral/answers/1850538-summation-for-every-value-of-n-or-summation-with-looping

Answer 1

[Jonas]

you could generate all values you asked for with a single expression. if you want the sum until a specific n, use cumsum() on the resulting vector

n=1:50;
B=7.5;
Q=[1 2*cos(n*B).^(5/2)]

Q = 
   1.0000 + 0.0000i   0.1415 + 0.0000i   0.0000 + 1.0060i   0.0000 + 1.4254i   0.0187 + 0.0000i   1.9027 + 0.0000i   0.4000 + 0.0000i   0.0000 + 0.5958i   0.0000 + 1.7705i   0.0000 + 0.0008i   1.6314 + 0.0000i   0.7718 + 0.0000i   0.0000 + 0.2688i   0.0000 + 1.9696i   0.0000 + 0.0570i   1.2433 + 0.0000i   1.1963 + 0.0000i   0.0000 + 0.0705i   0.0000 + 1.9805i   0.0000 + 0.2399i   0.8177 + 0.0000i   1.5927 + 0.0000i   0.0000 + 0.0023i   0.0000 + 1.8009i   0.0000 + 0.5541i   0.4366 + 0.0000i   1.8803 + 0.0000i   0.0127 + 0.0000i   0.0000 + 1.4690i   0.0000 + 0.9585i   0.1635 + 0.0000i   1.9988 + 0.0000i   0.1212 + 0.0000i   0.0000 + 1.0538i   0.0000 + 1.3810i   0.0260 + 0.0000i   1.9228 + 0.0000i   0.3649 + 0.0000i   0.0000 + 0.6384i   0.0000 + 1.7382i   0.0000 + 0.0001i   1.6687 + 0.0000i   0.7265 + 0.0000i   0.0000 + 0.2993i   0.0000 + 1.9563i   0.0000 + 0.0451i   1.2899 + 0.0000i   1.1489 + 0.0000i   0.0000 + 0.0857i   0.0000 + 1.9890i   0.0000 + 0.2127i

size(Q)

ans = 1×2

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