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Basic Operation with the middle number of odd matrix
# Take an odd matrix *like* 3-by-3 # Access the *middle element* of the matrix i.e in case of 3-by-3 matrix the index of the pa...

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AK Sorting according to given order
Conventional ascending order of one digit number is [ 0, 1, 2, ......9]. Now this order is changed and stored in vector a. For e...

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Chess ELO rating system
The Elo rating system is a method for calculating the relative chess skill levels of players in competitor-versus-competitor gam...

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Increasing sub-sequence (Level 1)
Given a vector, v, of real numbers, return a positive integer, n, representing the longest contiguous increasing sub-sequence co...

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Is there a GPU Device?
Return true if there is a supported GPU device available on the Cody computer.

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Besson Ranks
Return Besson Ranks. You can look at <https://www.sciencedirect.com/science/article/pii/0895717789903671 this article.> Besso...

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Dealing with correlation results!
In this problem we would like to transform correlation coefficient MATRIX to a VECTOR which includes only unique elements of coe...

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Calculate F statistics ( One-way Analysis of Variance)

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Cryptography with A Square Matrix : Decoding
Previous Problem: <https://www.mathworks.com/matlabcentral/cody/problems/45279-cryptography-with-a-square-matrix-encoding Crypto...

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Cryptography with A Square Matrix : Encoding
Matrix inverse operation can be used to encode or decode of a message. For example text = 'matlab & cody'. numeric e...

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unique with nan
input x = [2 NaN 3 5 NaN; 1 NaN 4 9 NaN; 8 -2 7 6 -2; 7 4 8 5 4]; output y_correct = [2 ...

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Fill the Matrix - 2
Input is a column vector and n. n columns will be added to the left of the input column. The first value of the row is the me...

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Fill the matrix - 1
Input is a column vector and n. n columns will be added to the left of the input column. The first value of the row is the s...

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Grouped Frequency Distributions

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A shooting competition
In a shooting competition, the target is a square of side L containing a circle of radius R<=L/2. A player scores one point if h...

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provide the numerical answer to these number questions...
return a row matrix containing the sorted numbers which answer the following questions: a) what is the first Knuth number to...

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persistant sum
There will be 9 tests for this problem. In each test you will be provided with 2 integers n=[n1,n2], where n2 is equal to t...

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Problema

Compute a sum involving the totient over divisors of a number
Write a function to compute the following sum: where is the totient function. The sum is computed over the divisors of (inc...

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The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

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Longest Sequence of NaNs
In an array return the length of longest sequence of nans for each column. x = [ 2 3 1 2 5 6; nan nan 5 n...

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Split array into pieces according to corresponding array
An array x of length n has values 1...m with each value appearing at least once. The values are sorted (n>=m). A second...

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How close to a hole
Suppose you have a description of good places (ones) and bad places (zeros). You want to know your distance from a bad place (in...

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Combine Data With Gaps
Combine data sets a and b where the datasets have "gaps" or unique points. Example: Input a = [1,0; 2,1; ...

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Problema

Compute the effective conductivity of a heterogeneous aquifer
Slow flow through soil or another porous medium follows Darcy’s law, which relates the flow of water to the gradient in piezome...

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Nuclear Binding Energy
Compute the approximate nuclear binding energy in MeV using the least-squares fit of the semi-emirical mass formula. Round to th...

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Find Elements in Range
Based on a question on <http://www.mathworks.com/matlabcentral/answers/ MATLAB Answers>. Find all the elements of a vector wh...

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Print the largest eigenvalue of A(500)
Write a function that prints the largest eigenvalue of A(500), without any extraneous output. For a positive integer n, let A...

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Beat the test suite if you can :)
Solve this problem based on clues in the test suite.

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Find the mean of a 2-D matrix after excluding elements of specified sub-matrix
You need to find the mean of a 2-D matrix after excluding elements which form an inner sub-matrix. e.g. If the input 2-D matrix ...

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Determine the number of correct and incorrect answers
In a Multiple Choice Question Test, you are to sort out answer from 4 samples, one of them is correct answer. There are 50 quest...

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