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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 : ...

6 years ago

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Determine if input is a Narcissistic number
<http://en.wikipedia.org/wiki/Narcissistic_number Narcissistic number> is a number that is the sum of its own digits each raised...

6 years ago

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Determine if input is a perfect number
A <http://en.wikipedia.org/wiki/Perfect_number/ perfect number> occurs whent the sum of all divisors of a positive integer, exce...

6 years ago

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Number of odd and even elements within matrix
Input(m) - any matrix with integers Output(n) - n(1)=number of odd elements, n(2)=number of even elements Example: * m=...

6 years ago

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Separate even from odd numbers in a vector - without loops
*Without using loops*, rearrange a vector of integers such that the odd numbers appear at the beginning, and even numbers at the...

6 years ago

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Back to basics 5 - Clipboard
Covering some basic topics I haven't seen elsewhere on Cody. Copy the input string to the clipboard

6 years ago

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Specific Element Count
Given a vector _v_ and a element _e_, return the number of occurrences of _e_ in _v_. Note: NaNs are equal and there may be n...

6 years ago

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Sum of adjacent elements in a vector
Given a vector v, return a vector s containting the sum of every two adjacent elements in the vector. Every element s(i) cont...

6 years ago

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Specific toolboxes
Given a string that is the name of a MATLAB toolbox, return true if it is available on the Cody solvers evaluation system, false...

6 years ago

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How to get the additive inverse of a uint8.
Given x as a uint8 find the additive inverse y.

6 years ago

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Tax Calculator
Calculate the tax for a given income. 10% tax is paid for any income up to $2,000. 20% tax is paid for additional income u...

6 years ago

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Vertical matrix sort
Given a matrix x with n rows and m columns, return a matrix y with 2n rows and m columns, such that every column in x is sorted ...

6 years ago

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Horizontal matrix sort
Given a matrix x with n rows and m columns, return a matrix y with n rows and 2m columns, such that every row in x is sorted fro...

6 years ago

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Add a vector to a matrix
Given a matrix |mat| of size |mXn| and a row vector |v| of size |1Xs|, return a matrix with |m+1| rows that conatains |mat| over...

6 years ago

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Convert a vector into a number
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

6 years 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 |...

6 years ago

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Distance walked 2D
Suppose you go from x-y coordinates [3,4] to [0,0] to [0,1] to [1,1], then you walked 7 units of distance.

6 years ago

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Negative matrix
Change the sign of all elements in given matrix.

6 years ago

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Generate the sum of Squares of the given number
|P(n) = 1^2 + 2^2 + ... + n^2| |P(1) = 1| |P(2) = 1 + 4 = 5;| |P(3) = 5 + 9 = 14;| |P(4) = 14 + 16 = 30;|

6 years ago

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Find the longest sequence of 1's in a binary sequence.
Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

6 years ago

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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...

6 years ago

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Evaluate Polynomial
Given a polynomial equation coefficients in a vector p, you have to return its value at x. Example: For inputs p and x ...

6 years ago

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Polynomial Multiplication
Multiply two polynomial equation.Given polynomial coefficients a and b.

6 years ago

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Positive Infinity
Round the array a towards positive infinity

6 years ago

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Bit to Gigabyte
1 bit = 1.25 × 10^-10 gigabytes | x is bit | y is gigabyte

6 years ago

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Alternating sum
Given vector x, calculate the alternating sum y = x(1) - x(2) + x(3) - x(4) + ...

6 years ago

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Solving a quadratic equation
Given a, b and c, Return the solution of the following quadratic equation: a*x^2 + b*x + c = 0.

6 years ago

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Divisors of an integer
Given a number N, return a vector V of all integers that divide N. For example, N = 10 Then V=[1 2 5 10]

6 years ago

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Matlab Basics II - Determine if an array has a 3rd dimension
For an array A, determine whether it has 3 dimensions, return 0 if x is only 2D, and 1 if x is 3D

6 years ago

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Create an anti-identity matrix
Create an anti-identity matrix of given dimension. Examples n = 2 A = [0 1; 1 0] n = 3 A = [0 0 1; 0 1 0; 1 0 0...

6 years ago