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Count up then down

Create a function that produces counting up from 0 up to n then down to 0 n=2 --> 0 1 2 1 0 n=3 --> ...

presque 9 ans ago

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Get ranks of values in a vector

For a given vector, say [6 3 8 2], return the ranks (ascending) of observations, i.e. [3 2 4 1]. Do not worry about tied ranks. ...

presque 9 ans ago

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Create a random logical vector of N elements of which M are true.

Your task for tomorrow is to create a random binary (logical) vector of N elements of which M are true. For example: ran...

presque 9 ans ago

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Is X a Fibonacci Matrix?

In honor of Cleve's new blog and post: <http://blogs.mathworks.com/cleve/2012/06/03/fibonacci-matrices/> Is X a Fibonacci ...

presque 9 ans ago

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Reverse Boggle

*Description* In the classic Parker Brothers game <http://en.wikipedia.org/wiki/Boggle Boggle>, players find words from a 4x4...

presque 9 ans ago

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Angles of the hands of a clock

For this problem, consider an analog (or at least continuous digital representation) of a clock. Our clock is a 12 hour clock w...

presque 9 ans ago

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FizzBuzz

<http://c2.com/cgi/wiki?FizzBuzzTest FizzBuzz Test> The "Fizz-Buzz test" is an interview question designed to help filter out...

presque 9 ans ago

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Reference Index Number

Given a reference set R of elements (each unique but identical in type), and a list V of elements drawn from the set R, possibly...

presque 9 ans ago

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RMS value from a set of observations

Find rms value of a set of observations of a physical quantity? Hint: The observations are accessed in the form of vectors

presque 9 ans ago

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Create array of all Distances between two Sets of Points : No Neural Network Toolbox

This Challenge is a subsection of <http://www.mathworks.com/matlabcentral/cody/problems/1110-usc-fall-2012-acm-martian-pranks Ma...

presque 9 ans ago

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love is an n-letter word

Given a list of *N words*, return the *N-letter word* (choosing one letter from each word) with the property of having the least...

presque 9 ans ago

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Hangman (strategy)

What is the best strategy in a <http://en.wikipedia.org/wiki/Hangman_(game) hangman> game? Your job is to device a strategy t...

presque 9 ans ago

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matrix zigzag

Unfold a 2-D matrix to a 1-D array in zig-zag order, e.g., for matrix [ 1 2 3 ; 4 5 6 ; 7 8 9 ] the resulting 1-...

presque 9 ans ago

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Hangman (easy)

What is the best letter to start a <http://en.wikipedia.org/wiki/Hangman_(game) hangman> game with? You are given a cell arra...

presque 9 ans ago

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Insert zeros into vector

Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

presque 9 ans ago

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Replace multiples of 5 with NaN

It is required to replace all values in a vector that are multiples of 5 with NaN. Example: input: x = [1 2 5 12 10 7] ...

presque 9 ans ago

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Golomb's self-describing sequence (based on Euler 341)

The Golomb's self-describing sequence {G(n)} is the only nondecreasing sequence of natural numbers such that n appears exactly G...

presque 9 ans ago

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rotating a matrix

if x is the input argument,rotate it 90 degrees without using rot90 function.

presque 9 ans ago

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distance between two points

compute distance between two points,where it is in Cartesian, Polar or Spherical coordinates.

presque 9 ans ago

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Say something funny

Say something funny, or not. Your solution will be (fully automatically and objectively) scored based on how clever or funny ...

presque 9 ans ago

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The Answer to Life, the Universe, and Everything

A variation of a previous Hitchhiker's Guide to the Galaxy problem. *Inputs:* Life, the Universe, and Everything *Output:*...

presque 9 ans ago

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Possible Outcomes of American Roulette

The payout for American roulette can be calculated by: payout = (38/n)-1 where n is the number of squares the bet covers. ...

presque 9 ans ago

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Polynomial division

Divide a polynomial u by polynomial v and return the quotients only. Example: u = x^4+3*x^3+5*x+3 v = x^2+1 Answer: ...

presque 9 ans ago

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Accessing elements on the diagonal

Access the diagonal elements of a matrix without 'diag' function

presque 9 ans ago

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Sort a vector

Sort a row vector without using MATLAB built_in function sort, descending or ascending as mentioned with t='de' or t='as'.

presque 9 ans ago

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Identify the heavier bag

There are N=2^n bags of rice looking alike, N-1 of which have equal weight and one is slightly heavier. The weighing balance is ...

presque 9 ans ago

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Wheat on a chessboard pt 2

If a chessboard were to have wheat placed upon each square such that x grains were placed on the first square and each successiv...

presque 9 ans ago

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finding indices of a vector's elements

you have vector x,as input,sort it ascending by mathlab function or your own code,then in the new vector,sorted_x,for each eleme...

presque 9 ans ago

Solved

Wheat on a chessboard pt 1

If a chessboard were to have wheat placed upon each square such that one grain were placed on the first square and each successi...

presque 9 ans ago