# Muthu Annamalai

### MathWorks

Regular Joe :)

DISCLAIMER: Any advice or opinions posted here are my own, and in no way reflect that of MathWorks, Inc.

Professional Interests: Mathematical Modeling, Communications, Photonics, Optics

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**Content Feed**

Solved

First N Perfect Squares

*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];

7 years ago

How to create structure with while loop?

Hello Vy, You are looking for a event loop like this, answer = 'y' while strcmpi(answer,'y') %do something an...

7 years ago | 0

What code would I use for this question

The code depends on who gets the extra credit J I would recommend using a while loop like another example in page 4 of Cleve ...

7 years ago | 0

i am student, i want to detect the tumour that is lung cancer cells present in lungs using template matching algorithm.

Have you considered using Mathworks' <http://www.mathworks.com/products/computer-vision/features.html#object-detection-and-recog...

7 years ago | 1

How to insert char to table?

If you are mismatching to the number of rows in your Table. Try assigning a cell-array of strings to your Table out2, at the ...

7 years ago | 0

Solved

Model a mass spring system

Model an ideal mass-spring system shown below where the spring is initially stretched. <<http://blogs.mathworks.com/images/se...

7 years ago

Solved

Make a run-length companion vector

Given a vector x, return a vector r that indicates the run length of any value in x. Each element in r shows how many times the ...

7 years ago

Solved

Vigenere cipher - be like Sherlock Holmes!

You're a young detective. Every detective needs a function to decrypt a vigenère cipher. It's a modification of a caesar cipher....

7 years ago

Solved

Back to basics 8 - Matrix Diagonals

Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector of numbers, output a square array with the...

7 years ago

Solved

Sum my indices

Given inputs M and N (in that order), output an MxN matrix whose entries are equal to the sum of their indices. Example input...

7 years ago

how can i combine 8*8 blocks into image after inserting text in each block?

You have code that almost works, pending a linear transformation; I would suggest trying the 2-step recipe, # Build the mosai...

7 years ago | 0

Orthogonalization of time series data

Sounds like eig maybe useful, and you may find *principal component analysis* (PCA) of interest too. See <http://www...

7 years ago | 0

Importing Excel Files using a Function

MATLAB is not able to find your variable *workbookFile*. You should try to add a call to *narginchk(1,3)* in your code, like ...

7 years ago | 0

What is the best approach in editing script files with other script files ?

@Rodriguez, and @Cedric I propose an alternative way to look at the question; it would be nice to have same script return differ...

7 years ago | 0

Solved

Generate a vector like 1,2,2,3,3,3,4,4,4,4

Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

7 years ago

Solved

Parasitic numbers

Test whether the first input x is an n-parasitic number: <http://en.wikipedia.org/wiki/Parasitic_number>. ( _n_ is the second in...

7 years ago

Solved

Counting pulses in a signal

Count the number of pulses that are the result of summing each pulse generator block. Pulse Generator blocks produce a recurr...

7 years ago

Solved

Side of an equilateral triangle

If an equilateral triangle has area A, then what is the length of each of its sides, x? <<http://upload.wikimedia.org/wikipe...

7 years ago

Solved

Is this triangle right-angled?

Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

7 years ago

Solved

Area of an equilateral triangle

Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...

7 years ago

Solved

Area of an Isoceles Triangle

An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<http://upload...

7 years ago

Solved

Side of a rhombus

If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<http://upload.wikimedia.org/wikipe...

7 years ago

Solved

Length of a short side

Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

7 years ago

Solved

Project Euler: Problem 6, Natural numbers, squares and sums.

The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ...

7 years ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

7 years ago

Solved

Add two numbers

Calculate the sum of two numbers. Example input = [2 3] output = 5

7 years ago

Solved

Count up then down

Create a function that produces counting up from 0 up to n then down to 0 n=2 --> 0 1 2 1 0 n=3 --> ...

7 years ago

Solved

Generate N equally spaced intervals between -L and L

Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

7 years ago

Problem

Who am I ?

Who am I ? Write any function that reveals itself under these constraints. Hint: I am combinatorial code, and I don't like stat...

7 years ago | 0 | 12 solvers