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Rik


Last seen: Today Active since 2017

E-mails with feedback/questions about FEX submissions are welcomed. In general I will post e-mails about Answers on the related page, unless there is good cause not to do so.

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Create cell array of numeric arrays
Convert the input to a cell array, but only if necessary. If the input is a numeric array, return a 1-by-1 cell array contain...

mer än ett år ago

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Low level NaN
* I have a dataset. Columns represents different variables. * A variable may start with NaN or any double type number. * If i...

mer än ett år ago

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Get me!
Inspired by Now! problems. Do your best!

mer än ett år ago

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Is the input divisible by 3?
Return true if the input is divisible by 3 and false if not.

mer än ett år ago

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Ridge regularized linear regression
Given a predictor data matrix of size , target variable vector of size and a shrinkage factor (scalar) (ridge regularization...

mer än ett år ago

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String Logic 3
Example: 'CAT' --> 'RPI' 'DOG' --> 'SDV' 'MATLAB' --> 'BPIAPQ' 'ROSY' --> 'GDHN' 'TRUST' --> 'IGJHI' 'MOSTLY' --> 'BDHI...

mer än ett år ago

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For a given linear index as input for n sized square matrix, find corresponding row and column.
If input is 1, the row and column will be 1 and 1 respectively.

mer än ett år ago

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Solve a ballot counting problem

mer än ett år ago

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NaN

mer än ett år ago

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Unique - Very Very Large Numbers
Given a vector column, with some very large numbers, create the ascending sort and unique vector. *Input:* A (column vector)...

mer än ett år ago

Solved


Find files with extension ext in the current directory
List all files with extension 'ext' in the current directory. Return a char matrix with the name of files in rows. Return 0 if...

mer än ett år ago

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Global usage
This Challenge is to utilize Global variables. Global variables are risky as the subroutine may inadvertently and unwantingly...

mer än ett år ago

Solved


Determina si el número es primo
Primero, antes que nada: ¿Qué es un número primo? Un número primo es cualquier número que solamente se puede dividir por 1 y ...

mer än ett år ago

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Maximum of ND-array
Find the maximum element of a N dimensional array. Example: A=[1 2 4 ; -20 4 10]; The maximum is 10.

mer än ett år ago

Solved


Sum of Arithmetic Progression
Given the starting number, difference and the number of terms - find the sum of the arithmetic progression.

mer än ett år ago

Solved


There are 10 types of people in the world
Those who know binary, and those who don't. The number 2015 is a palindrome in binary (11111011111 to be exact) Given a year...

mer än ett år ago

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Numerical Integration
Input * |x0|, a real number greater than 0 Output * |I|, a numerical estimate of the integral x0 / I...

mer än ett år ago

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Differential equations I
Given a function handle |f| an initial condition |y0| and a final time |tf|, solve numerically the differential equation dy...

mer än ett år ago

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Make a Plot with Functions
Make a plot and test

mer än ett år ago

Solved


Monte-Carlo integration
Write a function that estimates a d-dimensional integral to at least 1% relative precision. Inputs: * d: positive integer....

mer än ett år ago

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The Birthday Phenomenon
First off, leap years are not being considered for this. In fact the year that people are born shouldn't be taken into considera...

mer än ett år ago

Solved


Throwing Dice - Will You Be Eaten By The Dragon?
You and a dragon have agreed to let dice rolls determine whether it eats you or not. The dragon will roll a single die, of x ...

mer än ett år ago

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Chess probability
The difference in the ratings between two players serves as a predictor of the outcome of a match (the <http://en.wikipedia.org/...

mer än ett år ago

Solved


Calculate Amount of Cake Frosting
Given two input variables r and h, which stand for the radius and height of a cake, calculate the surface area of the cake you n...

mer än ett år ago

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Solve a System of Linear Equations
Example: If a system of linear equations in x₁ and x₂ is: 2x₁ + x₂ = 2 x₁ - 4 x₂ = 3 Then the coefficient matrix (A) is: 2 ...

mer än ett år ago

Solved


Find the maximum number of decimal places in a set of numbers
Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not coun...

mer än ett år ago

Solved


Make roundn function
Make roundn function using round. x=0.55555 y=function(x,1) y=1 y=function(x,2) y=0.6 y=function(x,3) ...

mer än ett år ago

Solved


Rounding off numbers to n decimals
Inspired by a mistake in one of the problems I created, I created this problem where you have to round off a floating point numb...

mer än ett år ago

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