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Rotate counterclockwise a matrix 90 deg with left-bottom element
Example: Input [ 1 2 3 4 5 6 ] Output [ 3 6 2 5 1 4 ]

10 years ago

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sum of the first 10 odd numbers
y = sum(first_10_odd_numbers)

10 years ago

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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 ...

10 years ago

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Change Vector Value
Change the element of the vector with respect to the element of the direction vector If the element of the direction vecto...

10 years ago

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Product of Array
Given an array of numbers. Get the product of the array.

10 years ago

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Append two matrix as shown below example
Append two matrix as shown below example A=[1 2; 3 4] and B=[5 6;7 8] Answer must be 1 2 5 6 3...

10 years ago

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Perimeter
Given a sequence of points forming a closed path (first and last points are coincident) return the perimeter value. For example...

10 years ago

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Concatenate strings
concatenate a variable number of input strings to produce one outputstring

10 years ago

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Pluralization
Define function plu(n) that returns '' (an empty string) if n=1, or 's' otherwise. This is handy for displaying messages from a...

10 years ago

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Find the Nth Root of a Given Number
Find the Nth root of a given number x. Examples x = 4096 n = 4 y = 8 x = 625 n = 5 y = 3.6239

10 years ago

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Find the square of the sum of the digits of a number
If a number (n) is provided as an input, find the square of the sum of the digits of the number. Example If n = 21, the an...

10 years ago

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Basics: Divide integers to get integer outputs in all cases
Divide integers a and b in such a way that output y is always an integer (in ceil manner)

10 years ago

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"Find out the best cricket"
This is how I originally read Problem 2013, so let's just go with it. Give me the first and last name of the best cricket, rega...

10 years ago

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factorial of a number x
Factorial of a number x

10 years ago

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Matlab Basics II - Max & Index of Max
Write a function that takes a vector x, then returns both the max value in x and its location in the vector for example x ...

10 years ago

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Test
Answer the question and the correct answer write in vector. Only one answer is correct. 1a Yes 1b No 1c No 1d No ...

10 years ago

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Wilf-Zeilberger pairs
Take as inputs two functions _F_ and _G_, and two scalar values _n_ and _k_. Test whether the functions are candidates to be a W...

10 years ago

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Matlab Basics - Assigning Variables
Assign different types of data to variables: integer, double, and strings Example: A is a double, for example 2.34 B is a...

10 years ago

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Infernal Recursion
Consider the recursion relation: x_n = (x_(n-1)*x_(n-2))^k Given x_1, x_2, and k, x_n can be found by this definition. Wr...

10 years ago

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Upper triangular matrix
Create a function to retrieve the upper triangular matrix of a matrix (without using tril). The matrix will always be square. ...

10 years ago

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Are all the three given point in the same line?
In this problem the input is the coordinate of the three points in a XY plane? P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) how can...

10 years ago

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Symmetric matrix
You must create a n-by-n *symmetric* matrix such that A(row,col) = row/col for col >= row. Example if n =3 : output is : ...

10 years ago

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Proper Factors
Generate the proper factors of input integer _x_ and return them in ascending order. For more information on proper factors, ref...

10 years ago

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Create a matrix X, where each column is a shifted copy of the vector v
Example : in->v = (1:5)'; 1 2 3 4 5 out-> [1 5 4 3 2;2 1 5 4 3;3 2 1 5 4;4 3 2 1 5;5 4 3 ...

10 years ago

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create a circulant matrix
create a circulant matrix

10 years ago

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Evil Number
Check if a given natural number is evil or not. Read more at <https://oeis.org/A001969 OEIS>.

10 years ago

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Triangle Numbers Below N
This is an offshoot of <http://www.mathworks.com/matlabcentral/cody/problems/5-triangle-numbers Cody Problem 5: Triangle Numbers...

10 years ago

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Back to basics 24 - Symbolic variables
Covering some basic topics I haven't seen elsewhere on Cody. Given a string algebraic expression, return the symbolic variabl...

10 years ago

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Largest Twin Primes
<http://en.wikipedia.org/wiki/Twin_prime Twin primes> are primes p1, p2 = p1 + 2 such that both p1 and p2 are prime numbers. Giv...

10 years ago

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Find the logic
There exists one logic in between input and output. Find it (easy math). Example 1: x=13 then y=339; Example 2: x=26...

10 years ago