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Reduce - Map-Reduce
Write reduce function, that takes arguments and constantly folds results into next call argument, finally returning a value; ...

11 months ago

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Besson Ranks

11 months ago

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Find R*Rp-N*Np=1 given gcd(R,N)=1

11 months ago

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Grouped Frequency Distributions

11 months ago

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Compression: Encode and Decode
This Challenge is to compress an array created by randi(2^32-1,1000) and then decompress your data file. The first call will ...

11 months ago

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String Find with Wildcards of a Cell array
Given a cell array of strings and a search string with single character (?) or multiple character (*) wildness return the indice...

11 months ago

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Hamming Weight - Size Scoring
The Hamming Weight, <http://en.wikipedia.org/wiki/Hamming_weight wiki Hamming Weight>, in its most simple form is the number of ...

11 months ago

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SLP Calculation
The SLP Calculation Challenge is to implement SLP sequences and output the result as a string. SLP, Straight Line Program, creat...

11 months ago

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Falling on the Moon.

11 months ago

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Vogel-Dobbener entropy
*Vogel-Dobbener entropy* is a measure of dispersion for ordinal variables. Given an ordered list of distinct observations u_...

11 months ago

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Grandpa's telescope
Two grandkids Dorothy and Benjamin are sharing a telescope made by their grandpa, who used an old lens of spectacles as the obje...

11 months ago

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ismember: Enhanced Time Performance for 'rows' - Speed Scoring (90% savings)
The Challenge is to perform very fast the 'ismember' function for a long and wide array. The data is small integer representi...

11 months ago

Solved

ismember: Enhanced Performance for 'rows' and width - Speed Scoring (66% savings)
The Challenge is to perform very fast the 'ismember' function for a long and wide array. The width of the array is expanded fro...

11 months ago

Solved

Multiply to the limit?
If y = 4*x*x/pi/pi then what is the ultimate limiting result of (1+y/1/1)(1+y/3/3)(1+y/5/5)(1+y/7/7)... ... within 1000*eps?

11 months ago

Solved

arrayfun bomb

11 months ago

Solved

Scrabble Scores - 4
This problem is part of a set of problems that successively develop a more sophisticated Scrabble scoring routine. The point dis...

11 months ago

Solved

Restricted Multiplication v1

11 months ago

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Sum of infinite series.

11 months ago

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sum of binomial series

11 months ago

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Spectral Distance - Speed Scoring
Find quantity of pixels within a spectral distance from a given [r,g,b] spectra. *Spectral distance* = sqrt( (r0-ri)^2+(g0-gi...

11 months ago

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Opposite point of the earth, what is the antipodal of a point ?
Given two strings(lat and long) that represent the geographic coordinates of a point in the earth, you have to find out what is ...

11 months ago

Solved

Apply Function to Each Field of a Structure Array: Part 2
The builtin <http://www.mathworks.com/help/matlab/ref/structfun.html?=structfun structfun> applies a function handle to each fie...

11 months ago

Solved

Apply Function to Each Field of a Structure Array: Part 1
The builtin <http://www.mathworks.com/help/matlab/ref/structfun.html?=structfun structfun> applies a function handle to each fie...

11 months ago

Solved

Find Logic 25

11 months ago

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Find Logic 23

11 months ago

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Find Logic 21

11 months ago

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Find Logic 20

11 months ago

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GJam 2014 Rd 1c: Reordering Train Cars (Large)
This Challenge is derived from <http://code.google.com/codejam/contest/3004486/dashboard#s=p1 GJam 2014 Rd 1c: Reordering Train ...

11 months ago