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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 ]

7 years ago

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Summation of array

Given an array, Find the sum of all of the elements in it Examples: Input x = [1 2 3 5; 4 5 6 7]; Output y is 33

7 years ago

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Vertically stack two vectors

Stack two vectors on top of each-other so that... if A = [1 5 3] and B = [8 6 4] then C = [1 5 3 ; 8 6 4]

7 years ago

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Determine if input is divisible by three.

Given a positive integer, n, determine if n is divisible by 3. If yes, the function should output true. If no, false.

7 years ago

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Create a Matrix of Zeros

Given an input x, create a square matrix y of zeros with x rows and x columns.

7 years ago

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Determine the mean of matrix

Determine the mean of matrix without using mean function Hint: use simple algorithm

7 years ago

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Dice roll - lateral faces

For this problem, you will be provided with the values of a dice roll (regular six-sided dice). The number of dice will be at le...

7 years ago

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Dice roll - opposite faces

For this problem, you will be provided with the values of a dice roll (regular six-sided dice). The number of dice will be at le...

7 years ago

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Give prime Numbers upto n

You are given a input number x; print all the prime numbers less than equal to x.

7 years ago

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Go back n times

You will be given a column vector (such as x = [1; 2; 3; 4; 5; 6; 7; 8]). If (n=3) you will return following; [ 1 NaN NaN Na...

7 years ago

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Calculate trends in time series

Create a new variable that has trends in input series. If _t+1_ is bigger than or equal to _t_, than trend in _t_ will be 1, oth...

7 years ago

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Triangle sequence

A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

7 years ago

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Side of a rhombus

If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<http://upload.wikimedia.org/wikipe...

7 years ago

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Dimensions of a rectangle

The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...

7 years ago

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Side of an equilateral triangle

If an equilateral triangle has area A, then what is the length of each of its sides, x? <<http://upload.wikimedia.org/wikipe...

7 years ago

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Is this triangle right-angled?

Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

7 years ago

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Area of an equilateral triangle

Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...

7 years ago

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Length of a short side

Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

7 years ago

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Area of an Isoceles Triangle

An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<http://upload...

7 years ago

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Find the biggest empty box

You are given a matrix that contains only ones and zeros. Think of the ones as columns in an otherwise empty floor plan. You wan...

7 years ago

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Solitaire Cipher

Implement the <http://en.wikipedia.org/wiki/Solitaire_(cipher) solitaire cipher>. Since this is from Wikipedia, I am capturin...

7 years ago

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Find a subset that divides the vector into equal halves

Given a vector x, return the indices to elements that will sum to exactly half of the sum of all elements. Example: Inpu...

7 years ago

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Length of the hypotenuse

Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

8 years ago

Solved

Make a run-length companion vector

Given a vector x, return a vector r that indicates the run length of any value in x. Each element in r shows how many times the ...

8 years ago

Solved

How long is the longest prime diagonal?

Stanislaw Ulam once observed that if the counting numbers are <http://en.wikipedia.org/wiki/Ulam_spiral arranged in a spiral>, t...

8 years ago