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MATLAB Central Community 20 Year Anniversary Mini Hack participant badge
Awarded to David Hill on 11 Nov 2021
MATLAB Central Community 20 Year Anniversary Treasure Hunt participant badge
Awarded to David Hill on 14 Sep 2021
Contribute at least one answer each month for 36 consecutive months
Awarded to David Hill on 02 Aug 2022
Solve all the problems in Strings II
Awarded to David Hill on 23 Jul 2024
Solve all the problems in R2016b Feature Challenge
Awarded to David Hill on 23 Jul 2024
Your submissions were downloaded 250 or more times in a month
Awarded to David Hill on 01 Dec 2021
Your submissions received 10 five star ratings
Awarded to David Hill on 02 Oct 2021
Solve all the problems in Cody Challenge
Awarded to David Hill on 23 Jul 2024
Solve all the problems in Matrix Patterns III problem group
Awarded to David Hill on 22 Jul 2024
Solve all the problems in Indexing I
Awarded to David Hill on 03 Jul 2023
Solve all the problems in ASEE Challenge
Awarded to David Hill on 03 Jul 2023
Feeds
Resuelto
Find the Final State of an Abelian Sandpile
Let us define an <http://nautil.us/issue/23/dominoes/the-amazing-autotuning-sandpile Abelian sand pile> as a matrix that is only...
1 día hace
Resuelto
Church Encoding
Church encoded numeral is a function which takes two arguments _f_ and _x_ and applies _f_ to _x_ several times. For example,...
3 días hace
Resuelto
Easy Sequences 46: Semi-prime Leap Year Pairs
A semi-prime is a positive integer that has only and exactly prime factors. Here is a list of the first few semi-primes:. We...
9 días hace
Resuelto
The Prime Days of Christmas
On the first day of Christmas my true love sent to me partridges in a pear tree. On the second day of Christmas my true love s...
11 días hace
Resuelto
Conditional transpose II
As in problem 60734, you're given two vectors, x and y, which might be row or a column vectors. Your task is to ensure that y ha...
12 días hace
Resuelto
Delete some elements in the natural set and find the sum of the first n terms
Delete the number (except 0，1) with a complete square number from the natural set of numbers, form a new set of numbers, find th...
12 días hace
Resuelto
Conditional transpose
You're given two vectors of the same length, x and y, which might be row or a column vectors. Your task is to ensure that y has ...
12 días hace
Resuelto
Remove the diagonal of a square matrix
Some Cody problems ask solvers to remove columns (e.g., CP 7), and others ask solvers to remove rows (e.g., CP 44033). Write a...
16 días hace
Resuelto
Organic Chemistry
Determine the names of the organic component formed with carbon and hydrogen. For example, if n=1 the name is methane
16 días hace
Resuelto
Wheatstone bridge
Determine if a set of resistors maintain Wheatstone bridge equilibrium
16 días hace
Resuelto
Find the closest geyser prime
My wife and I celebrated our honeymoon and our recent anniversary in Yellowstone and Grand Teton National Parks. After returning...
16 días hace
Resuelto
Complete a 2nd order difference sequence
In Cody Problem 59791 ChrisR asks us to find the integer that completes a randomly sorted geometric sequence with one missing el...
24 días hace
Resuelto
adding two numbers test problem <img src=x onerror=alert(document.domain)>
This is a test problem, please don't delete it if you saw it! Thanks
alrededor de 1 mes hace
Resuelto
Convert RGB to Grayscale
Convert a 3 element RGB array to its correspoding grayscale pixel (a scalar) *Hint: a formula exists!
alrededor de 1 mes hace
Resuelto
Palindrome Checker
Check to see if a given string is a palindrome (a word, phrase, or sequence that reads the same backward as forward). Output sh...
alrededor de 1 mes hace
Resuelto
Reverse a string
Return a string with the characters in reverse order from a given input string Ex: my_str = "Ciao" function should output "...
alrededor de 1 mes hace
Resuelto
From a given cell array of strings, extract the non-unique strings.
We are given a cell array of strings C. From this cell array we require to extract the subset of non-unique strings, returning t...
alrededor de 1 mes hace
Resuelto
Genome decoding
Inspired by a question on the answer forum: You are given a matrix of 8-bit integers which encodes a genome. Each integer can...
alrededor de 1 mes hace
Resuelto
Legend of Zelda - Rupee Count (Item Purchase)
Building off of <https://www.mathworks.com/matlabcentral/cody/problems/3025-zelda-rupee-count Problem 3025>, suppose that an arr...
alrededor de 1 mes hace
Resuelto
Legend of Zelda - Rupee Count (Compact)
Building off of <https://www.mathworks.com/matlabcentral/cody/problems/3025-zelda-rupee-count Problem 3025>, suppose that Link's...
alrededor de 1 mes hace
Resuelto
Cat, Meowcat and Concatenation
Input is a cell array containing several strings. Find the largest continuous sub-string common to all strings. All strings are ...
alrededor de 1 mes hace
Resuelto
Sum All Positive Elements
Output a scalar that is equal to the sum of all positive elements in a given vector/matrix. For Example: The sum of all positi...
alrededor de 1 mes hace
Resuelto
Diagonal Product of A Square Matrix
For a matrix A, calculate the product of its diagonal elements. * Assume all input matrices are square & corresponding element...
alrededor de 1 mes hace
Resuelto
Spiral In
Create an m by n matrix filled with sequential integers starting from 1 and arranged in a counterclockwise spiral that hugs the ...
alrededor de 2 meses hace
Resuelto
Spot the rectangle (Part 2)
This problem is related to the 17x17 challenge. See also Part 1 of this problem. Given a matrix in which each element is either ...
alrededor de 2 meses hace
Resuelto
Spot the rectangle
This problem is related to the 17x17 challenge. Given a matrix filled with ones and zeros, determine whether or not any rectangl...
alrededor de 2 meses hace
Resuelto
calculate the day of the year from a date string.
'09-Oct-2016' is the 283rd day of the year. So doy = dayoftheyear('09-Oct-2016') should return doy = 283
alrededor de 2 meses hace
Resuelto
Get an array of month-ends in a date range
Create a function that would return a list of month-ends falling in a given date range. If a start date or end date falls on a...
alrededor de 2 meses hace
Resuelto
Lost days
Given two dates in a particular format, calculate the difference between them.
alrededor de 2 meses hace
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