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Probabilities - Balls and urns - 02
The urn contains B blue balls and R red balls. Each trial consists of drawing one random ball from the urn and observing its col...

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Expand a term
Given a term, as a string, expand it. e. g. f = '2(x + y)';

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Adding each element
Add the each element of the matrix.

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Select primes from the matrix.
Select primes from the matrix.

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Create a code for XNOR
Given two inputs, output XNOR of those two

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Find the outcast
All pairs have the same difference except for one. Output the index of the latter Example: input =[0 1; 1 0; 2 3; 4 5;] ou...

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Interpolate scattered data.
Most data was scattered, and there is no gird. There are three data [c] in three different area [x,y]. x=[1 3 4]; y=[1 ...

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Find my daddy long leg (No 's')
Given the ratio of the two legs,and the hypotenuse, find the value of the bigger leg

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Calculate RMSE
RMSE(Root Mean Square Error) is widely used to calculate error. Calculate RMSE between [a] and [b] a=[1 2 3 4] b=[0 1 2 ...

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Calculate geostrophic current
eta0=0.01; R=300; f=0.01; g=9.81; x=-500:50:500; y=-500:50:500; [x y]=meshgrid(x,y); eta=eta0*exp(-(x.^2+...

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Ceil Me Now
Get the ceiling of the input matrix

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How to find average of each column ?
How to find average of each column for a given matrix?

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how to find diagonal elements of a matrix?
how to find diagonal elements of a matrix?

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Calculate correlation.
There are two data. y1=[0 1 2 3 4]' y2=[2 3 4 5 6]' We can see positive relationship between y1 and y2. The relations...

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N-plicate me
Modified version of duplicate and triplicate me. Repeat elements of input vector with given input n Ex: input = [1 2 3 4 5...

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Calculate circle's property
[A R]=function(r) r is radius, A is area of circles, R is circumference.

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Calculate area of sector
A=function(r,seta) r is radius of sector, seta is angle of sector, and A is its area.

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Change coordinate from Cartesian to spherical coordinates.
[x,y,z] -> [t,p,r] [x,y,z] is a point in the Cartesian coordinates. change its coordinate to spherical (t,p,r), t is azimuth,...

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Calculate inverse matrix in square matrix
A=eye(3) Calculate inverse matrix of given input. B=function(A) ans = 1 0 0 0 1 0 ...

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Calculate inverse matrix in m by n matrix
x=(1:10)' y=roundn(2*x+7*rand(size(x)),-1) a*x=y Estimate a using inverse matrix calculation. This is principle of li...

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Vectors multiplication.
Multiply two vectors x transposed and y.Example x = [1 2 3 4 5 6 7 8 9 10 ] y = [ 1 2 ...

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Pointwise multiplication of vectors.
Pointwise multiplication of vectors x and y. Example x= [1 3 5 7 9 11 13 15 17 19] y=[ 1 4...

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Sum positive elements of matrix.
Calculate sum of positive elements of the matrix.

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Set x value to each even index of vector y.
Set x value to each even index of vector y.

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Calculate some equation
Using given inputs x and z, make two outputs that are y1=(xz)/(x/z)^2+14x^2-0.8z^2 y2=x^z-z^x+(x/z)^2-(z/x)^2

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Calculate temperature of object
An object that have initial temperature T0 is in a room that has temperature Ts. The object's temperature in time t is T=Ts+(...

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Calculate triangle's hypotenuse
There are 634 eggs. A box can take 18 eggs. How many boxes are needed? Input is number of eggs and output is number of needed...

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Compare two strings.
Compare two strings, whether they are equal or not.

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Сoncatenate two strings.
Сoncatenate two strings. Example s1='Hello' s2='world' result='Hello world'

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Can we make a triangle?
Given three positive number, check whether a triangle can be made with these sides length or not. remember that in a triangle su...

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