# David Burns

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**Content Feed**

Solved

Data Regularization

Provided is an m-by-n integer data matrix A whose elements are drawn arbitrarily from a set *S* = [1,2,3,...,S] for any large in...

4 months ago

Solved

Moving Product (Easy)

Given an input array A, write a function *movprod(A,k,dim)* to calculate the moving product over a sliding window of length *k* ...

4 months ago

Solved

Construct a "diagAdiag" matrix

Construct a matrix whose elements begin from 1 and end at n^2 with the order of arrangement as shown below: For: n = 4 ...

4 months ago

Solved

Matrix to 3-Column Matrix

Consider a matrix *A* such as A = [1 2 3 3 4 5 6; 2 3 4 5 6 7 8]; Can you convert this matrix to a three-column ...

4 months ago

Solved

Vector to 3-Column Matrix

Consider a vector *A* such as A = [1 2 3 3 4 5 6] Can you convert this vector to a three-column matrix like this: ...

4 months ago

Solved

Cookie Cutters

Given a larger and smaller matrix, perform element-by-element multiplication on the smaller matrix and a sub-matrix of the large...

4 months ago

Solved

Sort rows of a matrix

Sort rows of matrix A in an ascending order according to the last column Example input: A = [1 2 3;7 8 9;4 5 6]; Exam...

4 months ago

Solved

Block average ignoring NaN values

Given a matrix, calculate the block average of each disjoint sub-matrix while ignoring *NaN* values. Assume that the size of the...

4 months ago

Solved

Block average

Given a matrix, calculate the block average of each disjoint sub-matrix of the same size. Assume that the size of the matrix alo...

4 months ago

Solved

Crunch that matrix!

You are given an M x N matrix. Write a script that will compress this matrix into an M x (N/3) matrix, where each of the terms ...

4 months ago

Solved

Fill the Matrix - 2

Input is a column vector and n. n columns will be added to the left of the input column. The first value of the row is the me...

4 months ago

Solved

Fill the matrix - 1

Input is a column vector and n. n columns will be added to the left of the input column. The first value of the row is the s...

4 months ago

Solved

Replace secondary diagonal elements of a square array

Replace all the secondary diagonal elements of the square array A with the number n Example: A = [1 2 3 4 5 6 ...

4 months ago

Solved

Find the Final State of an Abelian Sandpile

Let us define an <http://nautil.us/issue/23/dominoes/the-amazing-autotuning-sandpile Abelian sand pile> as a matrix that is only...

4 months ago

Solved

Maximum of each diagonal

The well-known <http://www.mathworks.com/help/matlab/ref/max.html max> function can operate along either the rows or the columns...

4 months ago

Solved

Minimum of each diagonal

The well-known <http://www.mathworks.com/help/matlab/ref/min.html min> function can operate along either the rows or the columns...

4 months ago

Solved

Cumulative maximum of an array

Find the cumulative maximum of an array without using the built-in function <http://www.mathworks.com/help/matlab/ref/cummax.htm...

4 months ago

Solved

Cumulative minimum of an array

Find the cumulative minimum of an array without using the built-in function <http://www.mathworks.com/help/matlab/ref/cummin.htm...

4 months ago

Solved

Divide elements by sum of elements

In this problem, I ask you to write a function which will divide the elements of each column by the sum of the elements of the s...

4 months ago

Solved

Simulate one complete step in the Biham–Middleton–Levine traffic model

The <http://en.wikipedia.org/wiki/Biham%E2%80%93Middleton%E2%80%93Levine_traffic_model Biham–Middleton–Levine traffic model> is ...

5 months ago

Solved

Remove entire row and column in the matrix containing the input values

Remove the entire row and column from the matrix containing specific values. The specified value can be a scalar or a vector. Fo...

5 months ago

Solved

MatCAT - Reconstruct X from Its X-rays

Consider a matrix x x = [ 1 2 0 0 5 0 3 0 8 ] If we sum x along the rows we get row_sums = [3 5 11] ...

5 months ago

Solved

Toeplitize a matrix

Similar to <http://www.mathworks.com/matlabcentral/cody/problems/3094-hankelize-a-matrix Problem 3094. Hankelize a matrix>, now ...

5 months ago

Solved

Write a function man that takes a row vector v and returns a matrix H as follows..

Write a function called man that takes a row vector v as an input and returns a matrix H whose first column consist of the eleme...

5 months ago

Solved

Hankelize a matrix

Similar to <http://www.mathworks.com/matlabcentral/cody/problems/42501-toeplitize-a-matrix Problem 42501. Toeplitize a matrix>, ...

5 months ago

Solved

Matrix of Multiplication Facts

This is James's daughter again, sneaking into his Cody account. Thanks to your help in my math class last year, I did great! B...

5 months ago

Solved

Go to the head of the class!

You're given a matrix and a single number. If that number is in the matrix, reorder the matrix so that number is in the first r...

5 months ago

Solved

Must be in the front row...

You are given a matrix followed by a single number. Your object is to write a script that will shift the matrix around so that ...

5 months ago

Solved

Magnet and Iron

(Inspired from <http://www.mathworks.com/matlabcentral/cody/problems/112 Problem 112: Remove the air bubbles>) Iron (atomic n...

5 months ago

Solved

Replace Nonzero Numbers with 1

Given the matrix x, return the matrix y with non zero elements replaced with 1. Example: Input x = [ 1 2 0 0 0 ...

5 months ago