Generate sum of squares of numbers with matlab

Problem:

Write a function in matlab which gives the sum of squares of numbers until the numbers given. For example the input is 5 then the answer should be (1^2+2^2+3^2+4^2+5^2).

Solution:

The solution is quite simple and you can easily understand by seeing the program.

For explanation see it below the program section.

Program:

function answer = sum_of_squares(n)
%this function will calculate the sum of squares 
%of n numbers
%for Example if number is 5 then the function will calculate
%1^2+2^2+3^2+4^2+5^2

%Variable to store the value of the sum
answer = 0;
for i = 1:n
    answer = answer+i^2;
end

Download the above code in matlab file format from here: sum_of_squares.m

Explanation:

In this function we will loop through the numbers from 1 to n and we will square them and add them all to get the result.

First we will create a variable answer to store the value of the sum of the squares generated in each iteration. We will equate the answer variable to 0.

Now a for loop is created, and the iterator i is squared and added to the answer variable.

First iteration

After first iteration the value of the variable answer is 1

Second iteration

After second iteration the value of the variable answer is 1+4 = 5

and this iteration goes on till the number n is reached.

Note that I have not pasted any trial runs of the program because you have to try all of these and learn the solution.

Download the above post and read it offline here: sum_of_squares.pdf

The code was formatted using hilite.me

Run the program and comment below the output you are getting for a given input.
Keywords: sum of squares, matlab function