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Solved

Create logical matrix with a specific row and column sums

Given two numbers *|n|* and *|s|*, build an |n-by-n| logical matrix (of only zeros and ones), such that both the row sums and th...

1 year ago

Solved

Convert a Cell Array into an Array

Given a square cell array: x = {'01', '56'; '234', '789'}; return a single character array: y = '0123456789'

2 years ago

Solved

Split a string into chunks of specified length

Given a string and a vector of integers, break the string into chunks whose lengths are given by the elements of the vector. Ex...

2 years ago

Solved

Cell joiner

You are given a cell array of strings and a string delimiter. You need to produce one string which is composed of each string fr...

2 years ago

Solved

Stuff the Board

You have a stack of tiles to put onto an array-like playing board. Each tile has a number (always an integer), and the board var...

2 years ago

Solved

Do Fast Fourier Transformation

Example Fast Fourier Transformation from vector [2,1]) ans = 3 1

2 years ago

Solved

Scoring for oriented dominoes

Given a list of ordered pairs, and the order they should be placed in a line, find the sum of the absolute values of the differe...

2 years ago

Solved

Calculate area of sector

A=function(r,seta) r is radius of sector, seta is angle of sector, and A is its area. Area of sector A is defined as 0.5*(r^2...

2 years ago

Solved

Approximation of Pi

Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given numbe...

2 years ago

Solved

Pi Estimate 1

Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation1.pdf>

2 years ago

Solved

Who knows the last digit of pi?

There is only one man who knows the last digit of pi, who is that man? Give the name of that man, who, by popular believe, can ...

2 years 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 ...

2 years ago

Solved

Enlarge array

Given an m-by-n numeric array (A) and a 1-by-2 vector (sz) indicating the dimensions [p q] to enlarge each element, return an (m...

2 years ago

Solved

expand intervals vol.2

Similar to problem <http://www.mathworks.co.uk/matlabcentral/cody/problems/2528 2528>. This is a more general case, when bounds ...

2 years ago

Solved

Three...is a magic number.

Yes it is... It's a magic number... To help you get rid of that earworm, here's a new Cody problem. You are given a squar...

2 years ago

Solved

Max Change in Consecutive Elements

If an array is given as input then find the index of consecutive elements that represent maximum change. Example: Input ...

2 years ago

Solved

compress sequence into intervals

You're given a row vector of monotonically increasing integers most of which are consecutive. Find the upper and lower bounds of...

2 years ago

Solved

expand intervals

You're given a row vector of an even number of monotonically increasing integers. Each pair of consecutive integers is the lower...

2 years ago

Solved

Back to basics - mean of corner elements of a matrix

Calculate the mean of corner elements of a matrix. e.g. a=[1 2 3; 4 5 6; 7 8 9;] Mean = (1+3+7+9)/4 = 5

2 years ago

Solved

counting groups!

This problem is about counting groups. Example If you have x: x = [0.8 0.8 0.8 0.3 0.3 0.4 0.5 0.6 0.6 0.9] then a...

2 years ago

Solved

Replace pattern 0 1 0 and 1 0 1

Find and replace a pattern in a row of zeroes and ones. * Find 1 0 1 and replace it with 1 1 1 * Find 0 1 0 and replace it w...

2 years ago

Solved

remove single elements

Given a vector of integers, remove the elements that have appeared only once. The output elements should be in exact order as th...

2 years ago

Solved

Another colon problem

This is simple problem based on problems 555, 801, 1118, etc. Create an index vector from two input vectors. Example: ...

2 years ago

Solved

Sum of odd numbers in a matrix

Find the sum of all the odd numbers in a matrix. Example x = [2 3 5 7 1 4 11] y = 27

2 years ago

Solved

Decimation - Optimized for speed

This problem is similar to http://www.mathworks.com/matlabcentral/cody/problems/1092-decimation, only this time the score will b...

2 years ago

Solved

Decimation

When dealing to the Roman Army, the term decimate meant that the entire unit would be broken up into groups of ten soldiers, and...

2 years ago

Solved

Implement simple rotation cypher

If given a letter from the set: [abc...xyz] and a shift, implement a shift cypher. Example: 'abc' with a shi...

2 years ago

Solved

Flag largest magnitude swings as they occur

You have a phenomenon that produces strictly positive or negative results. delta = [1 -3 4 2 -1 6 -2 -7]; Marching thr...

2 years ago

Solved

Number of Even Elements in Fibonacci Sequence

Find how many even Fibonacci numbers are available in the first d numbers. Consider the following first 14 numbers 1 1 2...

2 years ago