How do I add the values calculated in a for loop in a array?

Question

I'm currently writing a code in MATLAB that plots the convergence of 1/N!, Where N goes from 1-10. I've created a for loop that calculates 1/N! for each value from 1-10 but how do I add each of the values calcuated in the for loop in a vector array?

clc,clear
Nterms = 10;
total = 0;

for ns = 0:Nterms
    newterm = 1/(factorial(ns));
    disp(['The term ',num2str(ns),' is:',num2str(newterm)])
    total = total + newterm; % Sum of series
end

Rotem · Accepted Answer · 2020-04-11 08:42:52Z

1

Allocate array before the loop (initialize with zeros), and put values to array using ns+1 as index:

clc,clear
Nterms = 10;
total = 0;

% Initialize the array with zeros - allocate memory space
arr = zeros(1, Nterms+1);

for ns = 0:Nterms
    newterm = 1/(factorial(ns));
    disp(['The term ',num2str(ns),' is:',num2str(newterm)])
    total = total + newterm; % Sum of series

    % Store newterm in index ns+1 of arr.
    arr(ns + 1) = newterm;
end

disp(arr);

answered Apr 11, 2020 at 8:42

Rotem

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1 Comment

KC ReLoDZz Over a year ago

Ahhh I was along the right line with prelocating the vector size, Thanks you for your help!

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