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Solved

Dick Van Dyck?

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

10 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 , ...

10 years ago

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Mr. Pyramidad & Ms. Whissy Bolower

Businessman Mr. B. M. Pyramidad was drinking with his new girlfriend Ms. Whissy Bolower. He disclosed to her that he has an ille...

10 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...

10 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...

10 years ago

Solved

Bang Bang in Bangalore

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

10 years ago

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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. ...

10 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...

10 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.

10 years ago

Problem

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.

10 years ago | 1 | 330 solvers

Solved

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...

10 years ago

Problem

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...

10 years ago | 1 | 299 solvers

Problem

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...

10 years ago | 1 | 134 solvers

Solved

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...

10 years ago

Solved

Sum of diagonal of a square matrix

If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

10 years ago

Solved

Replace May with April

For instance, if the input is input_str = 'The flowers may bloom in April'; then the output is output_str = 'The flo...

10 years ago

Solved

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 ...

10 years ago

Solved

Solve the set of simultaneous linear equations

Given this pair of simultaneous linear equations: 2x + 3y = 23 3x + 4y = 32 Find the solution set (x,y)

10 years ago

Solved

Is this matrix orthogonal?

Given a square matrix, a, determine whether it is orthogonal. INPUT: a, a n x n matrix OUTPUT: true or false

10 years ago

Solved

Tic Tac Toe FTW

Given a tic tac toe board: * 1 represents X * 0 represents empty. * -1 represents O It is X's move. If there is an imme...

10 years ago

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Leaking?

Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of its molecular weight. A b...

10 years ago

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Acidity of vinegar and salts

Assuming: pH (potentia hydrogenii) = - log10(H+ ionic concentration in mol/Liter). For a buffer solution containing acetic acid ...

10 years ago

Solved

Closely related?

Given a function past_records() that will report blood sugar level of two twin brothers some random number of days ago. For exam...

10 years ago

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ranch area?

Your friend has a ranch with four distinct boundary lines. Three boundary lines are ideal straight roads: (1) North Club Road, (...

10 years ago

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System of equations

Find a solution to a system of equations represented by a |n| by |n+1| matrix. For instance, [ 2 0 4; => 2*x = 4 ...

10 years ago

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Snakes on a plane

Given the dimensions of a 2-d plane, create a matrix where a "snake" of ones occupies the plane from top left to bottom right. ...

10 years ago

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Sorting

Assume that x is an n-by-2 matrix. The aim is to return the first column of x, but sorted according to the second column. Exa...

10 years ago

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Return the Fibonacci Sequence

Write a code which returns the Fibonacci Sequence such that the largest value in the sequence is less than the input integer N. ...

10 years ago

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Distance walked 3D

suppose you go from x-y-z coordinates [3,4,2] to [0,0,2] to [0,1,2] to [1,1,2], to [1,1,20] then you walked 25 units of distance...

10 years ago

Solved

Find common elements in matrix rows

Given a matrix, find all elements that exist in every row. For example, given A = 1 2 3 5 9 2 5 9 3 2 5 9 ...

10 years ago