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Sum the elements in either diagonal of a square matrix
Sum the elements of a square matrix that lie on either the major diagonal or anti-diagonal.

14 years ago

Solved


Possible Outcomes of American Roulette
The payout for American roulette can be calculated by: payout = (38/n)-1 where n is the number of squares the bet covers. ...

14 years ago

Problem


Happy 2013...
Happy 2013, everyone! An interesting tidbit about 2013 is that it is the first year since 1987 to contain four different digits...

14 years ago | 10 | 196 solvers

Solved


Happy 2013...
Happy 2013, everyone! An interesting tidbit about 2013 is that it is the first year since 1987 to contain four different digits...

14 years ago

Solved


Generate pi using logarithm
Generate pi using logarithm

14 years ago

Solved


Decrypt a secret message!
The crypto system in question is based on phone keyboard. We need two numbers in order to decrypt a word. First number represent...

14 years ago

Solved


Create a recurrence matrix for a vector of data
In <https://en.wikipedia.org/wiki/Conversation_analysis conversation analysis>, it's often useful to track the contributions fro...

14 years ago

Solved


String permutations on phone keyboard
Given a number such as 2639 return all possible string permutations using the phone-keyboard on <http://www.mathworks.com/matlab...

14 years ago

Solved


Visualization of experimental data across a surface
Assume that you have taken data across the surface of a sample, for example sheet resistance. The data is stored in a Nx3 matri...

14 years ago

Solved


Simple return on investment
Assume you have some money and want to invest all your money to stock market. You randomly select a stock and invest all your mo...

14 years ago

Solved


Reverse the elements of an array
Reverse the order of elements in an array: eg: input X = [ 1 2 3 ; 4 5 6 ; 7 8 9 ] o...

14 years ago

Solved


Compute next 1000-day birthday milestone
Given a birthdate in DD-MMM-YYYY format, compute the next 1000-day birthday milestone. For example, Abraham Lincoln was born on ...

14 years ago

Solved


Make a logical diamond using GALLERY function
Inspired from <http://www.mathworks.com/matlabcentral/cody/problems/1078-make-a-diamond Problem 1078. Make a diamond> In thi...

14 years ago

Solved


Find out missing number from a vector of 9 elements
You are given a vector of size 9, x = [x1 x2 x3 x4 x5 x6 x7 x8 x9] Elements of x may be randomly selected without repeati...

14 years ago

Solved


sum of non-primes
The sum of the non-primes below 10 is 1+4+6+8+9+10=38 Find the sum of all the non-primes below the input, N.

14 years ago

Solved


Colon operator of two vectors
You are given two vectors of equal length: VecStart, VecEnd Each vector contain a set of integers, where VecEnd(j)>=VecStar...

14 years ago

Solved


Create array of all Distances between two Sets of Points : No Neural Network Toolbox
This Challenge is a subsection of <http://www.mathworks.com/matlabcentral/cody/problems/1110-usc-fall-2012-acm-martian-pranks Ma...

14 years ago

Solved


Create array of all Distances between two Sets of Points
This Challenge is a subsection of <http://www.mathworks.com/matlabcentral/cody/problems/1110-usc-fall-2012-acm-martian-pranks Ma...

14 years ago

Solved


Aufbau principle
Given the order e=[1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p], find a vector x with these condi...

14 years ago

Solved


Find matching string from a list of strings
Write a function that returns a string that is a unique match (if it exists) of the string |inStr| from a list of strings |strLi...

14 years ago

Solved


Compress strings (not springs)
Please remove excess space, limit one space between others, and no space before punctuation marks. * For example, 'Trendy , ...

14 years ago

Solved


Raise Matrix to Power
For a given square matrix x and scalar a, find x^a without using '^' or 'mpower'.

14 years ago

Solved


USC Spring 2012 ACM: Armageddon
This Challenge is to solve Question E, Armageddon, of the <http://contest.usc.edu/index.php/Spring12/Home USC ACM Spring 2012 Co...

14 years ago

Solved


Find max
Find the maximum value of a given vector or matrix.

14 years ago

Solved


I've got the power! (Inspired by Project Euler problem 29)
Consider all integer combinations of a^b and b^a for the integer values 2 ≤ a ≤ 4 and 2 ≤ b ≤ 5: 2^2=4, 2^3=8, 2^4=16,...

14 years ago

Problem


I've got the power! (Inspired by Project Euler problem 29)
Consider all integer combinations of a^b and b^a for the integer values 2 ≤ a ≤ 4 and 2 ≤ b ≤ 5: 2^2=4, 2^3=8, 2^4=16,...

14 years ago | 2 | 150 solvers

Solved


Design matrix from eigenvalues
Write a function that takes one input argument n and outputs a (n x n) square matrix A with the following properties: -A has...

14 years ago

Solved


Unique: Speed Enhancement for uint(8,16,32)
This Speed Performance Challenge is to optimize Unique for processing uint8/uint16/uint32 variables. *Input:* A (column vecto...

14 years ago

Solved


QWERTY Shift Code Decoder
Decode a string encoded using the QWERTY shift code. QWERTY shift code is where the message was touch typed but with an offse...

14 years ago

Solved


REPMAT Enhancement - Faster for Large Row Replication of Vector
The Challenge is to modify repmat.m to maintain all of its normal functionality and enhance its performance for large row replic...

14 years ago

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