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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...

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Remove the first, third and fifth rows of a matrix
Given a matrix x with at least five rows, return a matrix y that includes all rows of x except for th 1st, the 3rd and 5th. E...

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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...

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Circumscribed circles
Given the lengths of the 3 sides of a triangle, output the radius of the circumscribed circle. Example: [3 4 5] -> 2.5

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Woodall number
Test whether the input is a Woodall number: <http://en.wikipedia.org/wiki/Woodall_number> _Please do not cheat by simply chec...

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Lambert's W
Matlab cody does not support lambertw. Try to create a lambert's w function yourself. Lambert's W is the function that solves...

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newRMS
find root mean square of a signal x in less time than the test code and accurate to six places.

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Least common multiple of many numbers
1:6 -> 60

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Implement a ROT13 cipher
Replace each character in string s1 with the character that is shifted 13 positions from it (wrap back to the beginning if neces...

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Special matrix
Make a square matrix with this shape. For n=4 M = 1 1 0 0 1 0 1 0 0 1 0 ...

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Hard limit function
Classify x data as if x>=0 then y=1 if x<0 then y=0 Example x = [ -2 -1 0 1 2] y = [ 0 0 1 1 1]

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Related Vectors
I have two vectors A & B. If the values in vector A is zero then the corresponding value in vector B should be zero. Example:...

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Binary
Given a positive, integer n, create a function that returns the respective binary number in the form of a vector. Example: ...

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Sum the real and imaginary parts of a complex number
Sum the real and imaginary parts of a complex number. Example c = 1+2i has the solution 1 + 2 = 3

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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=...

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Matrix rotation as per given angle
Given a user defined matrix and angle of rotation, rotate the elements of output matrix as clockwise or anti-clockwise. Angle wi...

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

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Hofstadter Q sequence
The Hofstadter Q sequence is defined as follows: The first elements of the sequence are 1, 1, 2, 3, 3, 4, 5, 5, 6, 6. Write ...

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Remove Unique Elements
Given a list of integers, we want to keep only the non-unique elements in this list. To do this, we need to remove all the uniqu...

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Do you have the minimum age?

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End Digits

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Sort by absolute value
Given a list of numbers, arrange them in ascending order based on their absolute values. For example, for the list [-30, -5, 1...

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Find the largest sum of any contiguous subarray
Given an array of N integers, find the contiguous subarray (which must contain at least one number) with the maximum sum and ret...

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Estimating Monthly Electricity Cost for a Household Appliance
You recently bought an electric kettle for your kitchen, and you want to estimate how much it costs to run every month. The kett...

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Voltage Divider Calculation
A voltage divider is a simple circuit used to obtain a reduced voltage from a higher voltage source using two resistors in serie...

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LED Current Calculation
In an electrical circuit, the current (III) flowing through an LED is determined using Ohm’s Law: Where: I is the current ...

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Inductor Energy Storage Calculation
The energy (EEE) stored in an inductor is given by the formula: Where: E is the energy in joules (J) L is the inductance in...

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Calculate Charge Using Capacitance and Voltage
The charge (Q) stored in a capacitor is given by the formula:Q=C×V where: C is the capacitance (in farads) V is the voltage (...

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Energy Stored in a Capacitor
The energy (E) stored in a capacitor is given by the formula: where: C is the capacitance (in farads) V is the voltage (in ...

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Calculate Current in a Series Circuit Using KVL
Kirchhoff's Voltage Law (KVL) states that the sum of voltages around a closed loop is zero. Given a voltage source (V) and three...

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