# Franco Zapata

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**Content Feed**

Solved

Find similar sequences

Another problem inspired by a question on the <http://www.mathworks.com/matlabcentral/answers answers> forum. Given a matrix ...

5 months ago

Solved

Probability of Choosing a Red Ball

Given two jars of red and blue balls, find the probability of choosing a red ball from Jar 1 after going through the steps. ...

6 months ago

Solved

Calculate the probability that at least two people in a group share the same birthday.

Calculate the probability that at least two people in a group share the same birthday. Given an integer input n, return to 0.015...

6 months ago

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Please check the last row

We have data of matrix, that is input. That contains 2 or more rows and the last row should contain the average of each column,...

8 months ago

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Moving average (variable kernel length)

Find the moving average in a vector. The kernel length is a variable. For example x = 1:10 kernel_length = 2 would r...

8 months ago

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Weighted average

Compute the weighted average Y, of the vector A, given the weight vector W. The weighted average is the sum of the dot produc...

8 months ago

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Product of Each Column

Given a matrix |mat| with |n| columns, return a row vector |v| of length |n|, where every element in |v| is the product of the |...

8 months ago

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Calculate the sum of two polynomials

Calculate the sum of two polynomials if they are written in notation with their coefficients. example: a=[3 4 5]; b=[...

8 months ago

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Determinant without using det()

Given a square matrix A, compute the <http://en.wikipedia.org/wiki/Determinant determinant> of A. Note that you may not use t...

8 months ago

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Multiplication

Multiply two numbers in a different manner. The numbers are given to you as vectors x and y. Example x = [ 1 2 0 1 ] ...

8 months ago

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Sum the 'edge' values of a matrix

Sum the 'edge' values of an input matrix (the values along the perimeter). Example [1 2 3 4 5 6 7 8 9] Output = ...

8 months ago

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Parallel vectors

Return true or false depending on whether 2 vectors are parallel or not. Vectors can be 2 or 3 dimensional. The origin is not c...

8 months ago

Solved

Esoteric Trigonometry

From Wikipedia: "All of the trigonometric functions of an angle θ can be constructed geometrically in terms of a unit circle cen...

8 months ago

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Symmetry of vector

Determine whether the vector is symmetric or not (vector could be even or odd in length). For example: x = [1 2 3 3 2 1] ...

8 months ago

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Angle between two vectors

You have two vectors , determine the angle between these two vectors For example: u = [0 0 1]; v = [1 0 0]; The a...

8 months ago

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Spherical radius given four points

Determine the radius of a sphere provided four non-coplanar points on the surface of the sphere. pts = [x1 y1 z1; x...

8 months ago

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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 ...

8 months ago

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Diagonal Pattern

For a positive integer |n|, return an |nXn| matrix |mat| such that the value of each element in row |i| and column |j| is given ...

8 months ago

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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 ...

8 months ago

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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...

8 months 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...

8 months ago

Solved

create a square matrix

create a [n*n] matrix. example: mat(4)= [ 1 4 9 16 4 4 9 16 9 9 ...

8 months ago

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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 * ...

8 months 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]; ...

8 months 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;...

8 months 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...

8 months 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...

8 months ago

Solved

Word Search Solver

There are n words (minimum of three letters in each word) supplied with a given word search board. The answer will contain n row...

8 months ago

Solved

Tic Tac Toe Solver

Create a function that checks n number of tic tac toe boards housed in a 3x3xn matrix where the x's are represented as 1's (and ...

8 months ago

Solved

OXO counting

Count the number of occurrences of "OXO" in rows, columns, diagonals and anti-diagonals. Example: >> board = ['OOX' ...

8 months ago