Skip to main content

Generate using matlab sum of natural numbers from 1 to n using functions

Problem

Write a function in matlab which will find the sum of n natural numbers.

Solution

The solution is as simple as just generating the for loop and adding all the numbers generated by the for loop.
Find the Explanation below

Program


function answer = sum_of_numbers(n)
%This function will calculate the sum of n numbers
%For Example
%1+2+3+4+5+6+......+n

%A variable to store the value of the sum
answer = 0;
for i = 1:n
    answer = answer+i;
end

Explanation:

In this function the only part which a few people won't understand is after the initiation of the answer variable.
After the initiation of the answer variable, the for loop is started and now let us examine through the iteration to make it easy for understanding.

First iteration

Now as soon as the for loop starts, the value of i is 1, now the answer variable is changed from previous value( 0 ) to 0(previous value)+1(value of the iterator). Now the new value for the answer variable is 1.

Second iteration

In the second iteration the value of i is changed to 2 and deep into the loop the value of the answer variable is changed from previous value(1) to 1(previous value)+2(value of the iterator).
In the similar way the value is changed to 6 in the third iteration and this continues.

Download the above program as matlab file for use: sum_of_numbers.m

You can also get a pdf version of this post to read it offline: sum_of_numbers.pdf

Code has been highlighted using hilite.me

Run the program and comment below the output you are getting for a given input.

 Keywords: sum of numbers, matlab function
Labels:

Popular posts from this blog

Problem 60 Project Euler Solution with python

Prime pair sets The primes 3, 7, 109, and 673, are quite remarkable. By taking any two primes and concatenating them in any order the result will always be prime. For example, taking 7 and 109, both 7109 and 1097 are prime. The sum of these four primes, 792, represents the lowest sum for a set of four primes with this property. Find the lowest sum for a set of five primes for which any two primes concatenate to produce another prime. This problem is j u st a brute force problem. If you have come here because you don't know the limit upto which you will h ave to gener ate the prime numbers t hen go ahe ad and t r y with 10,000 . When I first start ed solving the problem I chose 1 million(beca use most of the problem s on project E uler have this limit ), but it took very long for the computer to fin d the solution. After searching on the internet then I found many people choosing 10, 000 so I have changed my in put f rom 1 million to 10000 and the output was f ast. He...
Read more

Add/Embed SVG to Blogger website

In this post I will tell you my method(trick) of adding SVG images in a blogger website or blog. Before starting , the first thin g I am assu m ing is that you are aware of SVG if you are here. If not please see S calable V ec tor G raphics Recently when I tried to embed a SVG image for a post on pygal, I tried uploading the SVG file and blogger Image uploader came up with an error, because of which I had to find some other way.  SVG File upload Error in Blogger  I started sea rc hing Google " Embed SVG in Blogger " . I found blogorrhea , w h ich gave some i nformatio n on add ing SVG directly as a markup , which worked , but I faced another problem using this . Also th is guy has used lot of Javascript which was confusin g for me, being new to using SVG.   So I first t houg ht of learning on h ow to embed SVG in HTML and t his on e worked out. Actually we can embed SVG in HTML i n following ways: Using Object tag Using Iframe tag Using embed...
Read more

Making a quiz web app with python and flask

Edit : When you are creating a web app with h tml templates, then y ou will have to sa ve the html file in templates folder in the Current Wor ki ng Directory( CWD). If you save the file in the C W D directl y you will get a TemplateNotFound error. Thank you Udhay for pointing it out.   In this post we will create a quiz website using python . I will be using the flask framework . After reading this tutorial you will learn form submission , flask templates , python code in flask templates , shuffling the questions and options with the random module and few others.  Please note that this tutorial is not big as it seems to be. Some of the code has been rewritten to maintain consistency and also font size is somewhat big so that your eyes won't get stressed reading this tutorial. Also the content has not occupied the full width of the page. In this tutorial I am assuming that you are having a very basic understanding of the flask framework . Please refer the documenta...
Read more