carl raes

Last seen: 3 months ago | Active since 2024

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Find longest run
Write a function longest_run that takes as input an array of 0's and 1's and outputs the length and index of the longest consecu...

9 months ago

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Convert binary numbers to hexadecimal numbers
Function must convert the input vector x composed of 0 and 1 (length is a multiple of 8) in hexadecimal. Most significant bit is...

9 months ago

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Binary
Given a positive, integer n, create a function that returns the respective binary number in the form of a vector. Example: ...

9 months ago

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Binary Coder
Take an input number and print the binary value of this number.

9 months ago

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Convert binary numbers array into array of decimal numbers.
Convert binary numbers array into array of decimal numbers. Example x=[ 11001000 ; 11001001 ; 11001010 ; 11001011 ; 11001100 ;...

9 months ago

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Can the knight take out the pawn?
* position of knight = k * position of pawns = p can the knight take out those pawns? * k='Nf4' * p={'g6','g7'} then...

9 months ago

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chess position
given the position of a chess piece in algebric notation, convert it into 8 by 8 matrix format. For example, * 'Qd5' >> [3,4]...

9 months ago

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Castling-02
This is a follow up of problem <https://www.mathworks.com/matlabcentral/cody/groups/1/problems/45329-castling-01> Given...

9 months ago

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Castling-01
Given the position of only one player's chess pieces(some of them) on the chessboard, figure out whether castling is valid or no...

9 months ago

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King's Cage
Given the position of the king on the chessboard, determine the minimum number of steps it'll require to reach the destination. ...

9 months ago

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Chess performance
After Problems <http://www.mathworks.com/matlabcentral/cody/problems/3054-chess-elo-rating-system/ 3054> and <http://www.mathwor...

9 months ago

Solved

Count the peaceful queens
In a 5x5 chessboard with a queen of one color (white, say) on the perimeter, one can place 12 black queens on the board such tha...

9 months ago

Solved

Consecutive Equation Times (of the day)
Many times throughout the day can represent mathematical equations. In this problem, we focus on the largest consecutive run of ...

9 months ago

Solved

Equation Times (of the day)
Many times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four bas...

9 months ago

Solved

Big numbers, least significant digits
Given two numbers, x and n, return the last d digits of the number that is calculated by x^n. In all cases, d will be the number...

9 months ago

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With apologies to William Blake
Coder Coder, typing fast Sitting at your desk, aghast. What immortal MATLAB script will solve this problem, nice and qu...

9 months ago

Solved

Digital Neighbourhood
Given a natural number reorder its digits to create another number, closest to the given one. Examples: * 123 gives 132, ...

9 months ago

Solved

Binary Neighbourhood
Given a natural number reorder its binary form to create another number, closest to the given one. Examples: * 1 gives 2, ...

9 months ago

Solved

Big numbers, repeated least significant digits
This problem builds off of Problem 3077 Given an integer x which contains d digits, find the value of (minimum) n (n > 1) such ...

9 months ago

Solved

Power Times (of the day)
Many times throughout the day can represent mathematical equations. In this problem, we focus on times that represent powers. Fo...

10 months ago

Solved

Convert to Binary Coded Decimal
Convert from decimal representation to <http://en.wikipedia.org/wiki/Binary-coded_decimal Binary Code Decimal> (or BCD) represen...

10 months ago

Solved

Find out the Gray Code for a Given Binary Number
Find out <http://en.wikipedia.org/wiki/Gray_code Gray Code> for a given binary number Example Binary input 1000 Gray ...

10 months ago

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Bit calculation
Give me the count of numbers from 1 to n having their last two bits as 0. For example function y = ret_count(4) y = x...

10 months ago

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Mysterious digits operation (easy)
What is this digit operation? 0 -> 0 1 -> 9 121 -> 9 44 -> 6 15 -> 5 1243 -> 7 ...

10 months ago

Solved

Evened up (or not)
You will be provided with an array or matrix that contains various numbers, in addition to an evening variable, e, set to 1 or 0...

10 months ago

Solved

De-primed
Write a function that will multiply every prime number in the array or matrix by two, leaving all other numbers the same, and re...

10 months ago

Solved

MatCAT - Reconstruct X from Its X-rays
Consider a matrix x x = [ 1 2 0 0 5 0 3 0 8 ] If we sum x along the rows we get row_sums = [3 5 11] ...

10 months ago

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Magnet and Iron
(Inspired from <http://www.mathworks.com/matlabcentral/cody/problems/112 Problem 112: Remove the air bubbles>) Iron (atomic n...

10 months ago

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Toeplitize a matrix
Similar to <http://www.mathworks.com/matlabcentral/cody/problems/3094-hankelize-a-matrix Problem 3094. Hankelize a matrix>, now ...

10 months ago

Solved

Hankelize a matrix
Similar to <http://www.mathworks.com/matlabcentral/cody/problems/42501-toeplitize-a-matrix Problem 42501. Toeplitize a matrix>, ...

10 months ago