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Spot the rectangle (Part 2)
This problem is related to the <http://bit-player.org/2009/the-17x17-challenge 17x17 challenge>. See also <http://www.mathworks....

14 years ago

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Spot the rectangle
This problem is related to the <http://bit-player.org/2009/the-17x17-challenge 17x17 challenge>. Given a matrix filled with ones...

14 years ago

Solved


Converting Decimal to Binary
Given a decimal number that may include a fractional component, convert it into binary representation. The numbers you are given...

14 years ago

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Selecting books on MATLAB for experts and beginners (blindfolded)
* Imagine you have been blindfolded and asked to pick up any two books randomly from the table. * There are n books suitable f...

14 years ago

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Count photos
Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total nu...

14 years ago

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Rosenbrock's Banana Function and its derivatives
Write a function to return the value of <http://en.wikipedia.org/wiki/Rosenbrock_function Rosenbrock's two-dimensional banana fu...

14 years ago

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Back to basics 26 - Keywords
Covering some basic topics I haven't seen elsewhere on Cody. Return a cell array of strings of all MATLAB keywords.

14 years ago

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Back to basics 25 - Valid variable names
Covering some basic topics I haven't seen elsewhere on Cody. Given a string, return true if it is a valid MATLAB variable nam...

14 years ago

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Back to basics 24 - Symbolic variables
Covering some basic topics I haven't seen elsewhere on Cody. Given a string algebraic expression, return the symbolic variabl...

14 years ago

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Fletcher-Reeves Conjugate Gradient Method
Write a function to find the values of a design variable vector, _x_, that minimizes an unconstrained scalar objective function,...

14 years ago

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Quasi-Newton Method for Unconstrained Minimization using BFGS Update
Write a function to find the values of a design variable vector, _x_, that minimizes an unconstrained scalar objective function,...

14 years ago

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Steepest Descent Method
Write a function to find the values of a design variable vector, _x_, that minimizes an unconstrained scalar objective function,...

14 years ago

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Let's do Markov Chains!
<http://en.wikipedia.org/wiki/Markov_chain Markov Chains> are really useful in a lot of fields. This problem will ask a question...

14 years ago

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Would Homer Like It?
Given a matrix of ones and zeros, you must determine if there are any doughnuts present (would Homer Simpson like it?). A doughn...

14 years ago

Problem


Fastest shortest-path-finder in the west
Given connectivity information about a graph, your job is to find the <http://en.wikipedia.org/wiki/Shortest_path_problem *short...

14 years ago | 3 | 20 solvers

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Find the Kronecker Tensor Product without using KRON
The Kronecker Tensor Product is the result of multiplying all elements of a matrix with each of the elements of another matrix. ...

14 years ago

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Make an awesome ramp for a tiny motorcycle stuntman
Okay, given a vector, say v=[1 3 6 9 11], turn it into a matrix 'ramp' like so: m=[1 3 6 9 11; 3 6 9 11 0; 6 9 ...

14 years ago

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Bang Bang in Bangalore
Imagine a strange language disorder, Bangolangosis, has developed among trigonometricians of <http://en.wikipedia.org/wiki/Banga...

14 years ago

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Oxidation State
* In some chemical compounds, the oxidation state of each atom of hydrogen H is +1. * In some chemical compounds, the oxidation...

14 years ago

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Formatting currency numbers
Given a number, format it properly for textual display using the notation $xxx,xxx,xxx.xx. Assume that no more than two digits ...

14 years ago

Solved


Fastest shortest-path-finder in the west
Given connectivity information about a graph, your job is to find the <http://en.wikipedia.org/wiki/Shortest_path_problem *short...

14 years ago

Solved


Surface Fit z(x,y)
Given three vectors x,y,z. Find four coefficients c = [cxx cxy cyy c00], such that z = cxx*x.^2+cxy*x.*y+cyy*y.^2+c00. For e...

14 years ago

Solved


Aufbau principle
Given the order e=[1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p], find a vector x with these condi...

14 years ago

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Is this group simply connected?
Given connectivity information about a graph, your job is to figure out if the graph is fully connected. You are given a list of...

14 years ago

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old wine in a new bottle?
* You have been given an apparently brand new unary function XXX, * that maps some ordinary scalars to scalars, * please gues...

14 years ago

Problem


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...

14 years ago | 6 | 67 solvers

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Dick Van Dyck?
* Not the celebrity, <http://en.wikipedia.org/wiki/Dick_Van_Dyke Dick Van Dyke>, * this problem relates to balanced strings of...

14 years ago

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Compress strings (not springs)
Please remove excess space, limit one space between others, and no space before punctuation marks. * For example, 'Trendy , ...

14 years ago

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Function Sniffer
* Given a string, * find out which built-in functions are present, * output a simple string, * that has sorted and unique ...

14 years ago

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Looking for Squares
Need n squares that equal one square all together, none zero, none fractured. For example, calling squares(2) should output [16...

14 years ago

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