# Nafees Ul Haque Akhand

### Bangladesh University of Engineering and Technology (BUET)

Under Grad. Student of Water Resources Engineering.

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Solved

Union Jack Matrix

Create a matrix of odd dimensions that has ones on both diagonals and dividing the matrix into 4 quadrants, resembling a square ...

3 days ago

Solved

Make a rainbow matrix (follow-up to checkerboard matrix)

Given an integer n, make an n-by-n matrix as shown below. The a(1,1) should be 0. As we move away from the top-left, the number ...

7 days ago

Solved

Dice face matrix!

This is dice simulator, but instead of making a random die number, you will receive an "pre-rolled" number in and spit out a mat...

7 days ago

Solved

Vandermonde Matrix

Create the Vandermonde Matrix of the given vector. The matrix consists of columns as powers of the vector, so the first column i...

7 days ago

Solved

Tent matrix

Create an n x n matrix that resembles one kind of tent. The variable n is provided to the function and will be an odd number. As...

7 days ago

Solved

Form a square matrix from four square sub-matrices

Create a square matrix, y, from 4 square sub-matrices that will be constructed (x1, x2, x3, x4): y = [x1 x2; x3 x4]; ...

7 days ago

Solved

Check if a matrix is a palindrome in all directions

Check if a matrix is a palindrome both vertically and horizontally. You function will return *true* for |[1,2,1]| or |[2,7,2;...

7 days ago

Solved

Make a diamond

Given n, odd number > 1, return n by n matrix consist of "null" and "*" characters arranged like a diamond. No toolbox funct...

7 days ago

Solved

Create a square matrix with given conditions

Create a square matrix, M, which should be populated as follows: M = [ n^2 n * (n-1) n * (n-2) ... n * 2 n * ...

7 days ago

Solved

Zero Cross

Write a function that counts the number of times n a signal x changes sign. Examples x = [1 2 -3 -4 5 6 -7 8 -9 10 11] ...

12 days ago

Solved

Combined Ages 2 - Symmetric, n ≥ 3

Following on <http://www.mathworks.com/matlabcentral/cody/problems/42382-combined-ages-1-symmetric-n-3 Combined Ages 2>, you wil...

14 days ago

Solved

Combined Ages 1 - Symmetric, n = 3

You have probably seen the common riddle wherein combined ages are provided and you must determine the individual ages. For exam...

14 days ago

Solved

Column norms of a matrix

Given a matrix M, return a vector y such that for each k y(k)=norm(M(:,k)) (y(k) is the Euclidean norm of the k-th col...

15 days ago

Solved

Number of problems

No, you don't read it wrong: this assignment is to return the number of this problem (and not the problem of this number).

15 days ago

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Find and replaces spaces from a input string with *

For a given input string str, find how many spaces are there in the string and replace those spaces with * e.g. str = 'this is ...

15 days ago

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Namespace

Create a set of n variable names 'a_1',...,'a_n' The result should be a column oriented cell array of strings. Example inp...

15 days ago

Solved

Wrap-around effect

In vector x of length n we define (n+1) position as going back to the first position (so called wrap-around effect). Can you ret...

15 days ago

Solved

Check capital letters

Check if each first letter of a string is a capital letter. for example: 'This Is Ok' gives a true answer and 'This Is not Ok' ...

17 days ago

Solved

Odd times 3

Given a input matrix x, multiply all odd values by 3. Even values remain the same. example: x = [1 2 3 4 5;... 6 7...

17 days ago

Solved

String revert

Revert all words in a sting x for example, if x = 'this is a sentence' then y should be 'sentence a is this'

17 days ago

Solved

Odd times even numbers in a matrix

First count the number of odd numbers in x, then the number of even. Return their product. example: x = [1 2] One odd ...

17 days ago

Solved

Binary Inversion

Given the unsigned 8-bit integer x, return the number y which is the binary inversion of x. For example if x is 5, y should b...

17 days ago

Solved

Bubble sort

Write your own bubble sort function ( <https://en.wikipedia.org/wiki/Bubble_sort>) to sort all elements in x in ascending order....

17 days ago

Solved

Remove multiples of N

in the vector x remove all multiples of N. x = [1 2 3 4 5 6]; N = 2; Then y = [1 3 5];

17 days ago

Solved

i forgot to use capital I

When referring to yourself you should write "I" (capital) and not "i". So correct the input string x, but be aware that other u...

17 days ago

Solved

Count the numbers

In a array x, count the number of times the number n appears in x. for example: x = [1 2 3 4 3 2 1 2] and n = 2 the answer sh...

17 days ago

Solved

sum of ASCII

Given a string x, return the sum of all ASCII numbers of all characters. for example, if x='lala' ('l'-> 108, 'a'->97) then y...

17 days ago

Solved

X plus binary inverted x

Given a n-bits number x, what is the sum of x to the binary inverted version of x? (this might be more simple than you think :-)...

17 days ago