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Check if an FAA N-Number is Valid
An N-number is a unique registration assigned by the Federal Aviation Administration (FAA) to every civil aircraft operating in ...

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Choose group with people
How many ways can you choose n groups of n people from n^2 people, assuming the groups are distinct? The number of people is gi...

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Create matrix with common dates from a number of structs -inner join on dates
Do an "inner join" (as in SQL) on a number of structs where the ".date" is the date and the ".ts" the timeseries. The join is on...

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Write a function that gives the ReLU of the input.
The ReLU function is given by, In here, x input can be a scalar, vector or a matrix.

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Percentage profit:6: Cumulative Interest
If a bank is giving r% yearly cumulative interest for deposit, how much money we can get by depositing x amount of money monthly...

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Let's do Markov Chains!
Markov Chains are really useful in a lot of fields. This problem will ask a question about a simple system with 3 states: A,B an...

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Compute Hamming distances between each pair of rows from two input matrices
For two input matrices _u_ ( _n_ x _uCols_ ) and _v_ ( _n_ x _vCols_ ) of numbers in range [0..255] (8-bit), such that each colu...

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Linear Least Squares (L2 fitting problem )
Given a set of real measurements (x(i), y(i)) find a line sol(1)x + sol(2) (more specifically furnish the vector with...

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Siblings of a graphics object
Given a valid, scalar, handle of a graphical object: find the set of all objects that have the same parent as the original that...

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Binary code for an analog signal
Digitization of a signal consists of 3 stages: sampling, quantization and encoding. Sampling convert the analogue signal into p...

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Dispatch and collect
Write a function that dispatches the single argument _x_ to multiple function handles (varargin) and concatenates vertically the...

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Roman numbers: how old is that building?
The front of old buildings sometimes show the year when they were built in roman numbers. These number are rather confusing and ...

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Takuzu row
Takuzu row is one row in a logic puzzle of a rectangular grid. The rules are as follows: (1) The row is filled with 1s and 0s...

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Function Call Counter

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Clear functions with the same name in different packages independently
See the test suite. N.B.: Overwriting files or functions a.k.a. cheating is not necessary.

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Tracer un carré de côté a et de centre O
Définir une fonction carre qui prend en entrée un salaire a et un vecteur O de deux élements représentant les coordonnées cartés...

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Boolean algebra
Your contractor from Elbonia has sent you the prototype of the new logical unit. It turns out that the only logical relation it ...

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Singleton Expansion without BSXFUN
BSXFUN is very useful and fast. In R2015b we can implement singleton expansion without BSXFUN, see the test suite for details...

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Derivative function
Given a function handle f, generate a function that evaluates the derivative of f Examples: f = @sin; df = De...

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Find the area between curves (P4)

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Find the area between curves (P2)

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Calculate convex quadrilateral Area: sides and an angle given

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Multivariate polynomials - sort monomials
In <https://www.mathworks.com/matlabcentral/cody/problems/44260-multidimensional-polynomials-convert-monomial-form-to-array Prob...

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Find a Hamiltonian Cycle in a Graph
You are given a graph g and asked to find a Hamiltonian cycle of g. See <https://www.mathworks.com/help/matlab/ref/graph.html...

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Restricted Multiplication v1
This problem is Restricted Addition v4 with multiplication and more restrictions. multiply two inputs without use of common ari...

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Restricted Subtraction v1
This problem is Restricted Addition v4 with subtraction and more restrictions. Subtract two inputs without use of common arithm...

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Restricted Addition v4
This problem is Restricted Addition v3 with more restrictions. Also, you must handle matrices. Add two inputs without use of co...

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Restricted Addition v3
This problem is <https://www.mathworks.com/matlabcentral/cody/problems/45258-restricted-addition-v2 Restricted Addition v2> with...

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Restricted Addition v2
This problem is Restricted Addition v1 with more restrictions. Also, you must handle negative and non-integer values. Add two n...

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N-Queens: Count All Valid Arrangements
The N-Queens puzzle places N queens on an N×N chessboard such that no two queens attack each other. A queen can attack another ...

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