MATLAB Answers


Calculate sum of series using for

Latest activity Commented on by James Tursa
on 20 Jun 2019
I need help to calculate the sum of this example using only for.
Thanks for the help!


What have you done so far? What specific problems are you having with your code? This is a very simple for-loop. Do you know how to write a for-loop?
In new to matlab and this is one of my first assignments. Im just confused at the i = m and also confused at what are my inputs. If you can recommend a book of webpage where I can learn more of this, I would also appreciate it.

Sign in to comment.

1 Answer

Answer by James Tursa
on 20 Jun 2019
Edited by James Tursa
on 20 Jun 2019
 Accepted Answer

Here is an outline to get you started:
a = something; % you put a value here
m = something; % you put a value here
x = something; % you put a value here
y = 0; % the starting y value
for i=1:m % the for-loop indexing
% you put code here to add something to y
end % the end of the for-loop
See the Getting Started tutorials here:


a = input("Value of a: ");
m = input("Value of m: ");
x = input("Value of x: ");
y = 0;
for i=1:m
y = ((a)*(x^i));
Like this I suppose?
I apologize again, as I said I'm new to this.
That's a good start at getting the values in. But in the for-loop, you want to be adding terms into y. The way you have it coded now, you are simply replacing the value of y with a new term. You need to correct the code inside the for-loop.

Sign in to comment.