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MathWorks

Active since 2012

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Problem

Project Euler: Problem 2, Sum of even Fibonacci
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 te...

bijna 13 jaar ago | 29 | 2298 solvers

Problem

Knight's Tour Checker
Given a matrix a, determine whether or not a legal <http://en.wikipedia.org/wiki/Knight's_tour knight's tour> is present. The kn...

bijna 13 jaar ago | 24 | 1389 solvers

Problem

Given two strings, find the maximum overlap
Given two strings s1 and s2, create a new string s3 which is as short as possible and contains both strings. If s1 = [1 2...

bijna 13 jaar ago | 25 | 1499 solvers

Problem

Target sorting
Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

bijna 13 jaar ago | 31 | 4466 solvers

Problem

Find state names that start with the letter N
Given a list of US states, remove all the states that start with the letter N. If s1 = 'Alabama Montana Nebraska Vermont Ne...

bijna 13 jaar ago | 8 | 1230 solvers

Problem

Get the area codes from a list of phone numbers
Given a string of text with phone numbers in it, return a unique'd cell array of strings that are the area codes. s = '508-647...

bijna 13 jaar ago | 8 | 1053 solvers

Problem

Connect Four Win Checker
<http://en.wikipedia.org/wiki/Connect_Four Connect Four> is a game where you try to get four pieces in a row. For this problem, ...

bijna 13 jaar ago | 24 | 1269 solvers

Problem

Calculate the Levenshtein distance between two strings
This problem description is lifted from <http://en.wikipedia.org/wiki/Levenshtein_distance>. The Levenshtein distance betwee...

bijna 13 jaar ago | 25 | 1424 solvers

Problem

Counting in Finnish
Sort a vector of single digit whole numbers alphabetically by their name, in Finnish. See the Wikipedia page for <http://en.wik...

bijna 13 jaar ago | 12 | 1582 solvers

Problem

It dseon't mettar waht oedrr the lrettes in a wrod are.
An internet meme from 2003 (read more <http://www.snopes.com/language/apocryph/cambridge.asp here>) asserted that readers are re...

bijna 13 jaar ago | 24 | 1804 solvers

Problem

Indexed Probability Table
This question was inspired by a Stack Overflow question forwarded to me by Matt Simoneau. Given a vector x, make an indexed pro...

bijna 13 jaar ago | 10 | 2451 solvers

Problem

Renaming a field in a structure array
MATLAB has a <http://www.mathworks.com/help/techdoc/ref/setfield.html setfield> and a <http://www.mathworks.com/help/techdoc/ref...

bijna 13 jaar ago | 11 | 1517 solvers

Problem

Remove the polynomials that have positive real elements of their roots.
The characteristic equation for a dynamic system is a polynomial whose roots indicate its behavior. If any of the <http://www.ma...

bijna 13 jaar ago | 5 | 1673 solvers

Problem

Longest Divisor Run
Given the vector a, find the longest run of consecutive numbers that can be evenly divided by the same number d where d > 1. ...

bijna 13 jaar ago | 8 | 1302 solvers

Problem

Prime factor digits
Consider the following number system. Calculate the prime factorization for each number n, then represent the prime factors in a...

bijna 13 jaar ago | 25 | 2270 solvers

Problem

Remove the small words from a list of words.
Your job is to tidy up a list of words that appear in a string. The words are separated by one or more spaces. Remove all words ...

bijna 13 jaar ago | 10 | 1494 solvers

Problem

DNA N-Gram Distribution
Given a string s and a number n, find the most frequently occurring n-gram in the string, where the n-grams can begin at any poi...

bijna 13 jaar ago | 7 | 1346 solvers

Problem

Implement a ROT13 cipher
Replace each character in string s1 with the character that is shifted 13 positions from it (wrap back to the beginning if neces...

bijna 13 jaar ago | 12 | 1649 solvers

Problem

Clean the List of Names
Given a list of names in a cell array, remove any duplications that result from different capitalizations of the same string. So...

bijna 13 jaar ago | 5 | 1718 solvers

Problem

De-dupe
Remove all the redundant elements in a vector, but keep the first occurrence of each value in its original location. So if a =...

bijna 13 jaar ago | 15 | 3147 solvers

Problem

Test for balanced parentheses
Given the input inStr, give the boolean output out indicating whether all the parentheses are balanced. Examples: * If ...

bijna 13 jaar ago | 9 | 1223 solvers

Problem

Mandelbrot Numbers
The <http://en.wikipedia.org/wiki/Mandelbrot_set Mandelbrot Set> is built around a simple iterative equation. z(1) = c z...

bijna 13 jaar ago | 15 | 1713 solvers

Problem

Find the palindrome
Given the string a, find the longest palindromic sub-string b. So when a = 'xkayakyy'; you should return b = 'kayak';

bijna 13 jaar ago | 9 | 1596 solvers

Problem

Balanced number
Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

bijna 13 jaar ago | 21 | 2988 solvers

Problem

Replace NaNs with the number that appears to its left in the row.
Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

bijna 13 jaar ago | 18 | 2975 solvers

Problem

Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

bijna 13 jaar ago | 39 | 3372 solvers

Problem

Read a column of numbers and interpolate missing data
Given an input cell array of strings s, pick out the second column and turn it into a row vector of data. Missing data will be i...

bijna 13 jaar ago | 23 | 2282 solvers

Problem

Alphabetize by last name
Given a list of names in a cell array, sort the list by the last name. So if list = {'Barney Google','Snuffy Smith','Dagwood ...

bijna 13 jaar ago | 17 | 2247 solvers

Problem

Find the peak 3n+1 sequence value
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

bijna 13 jaar ago | 24 | 2498 solvers

Problem

Kaprekar Steps
6174 is the <http://en.wikipedia.org/wiki/6174_%28number%29 Kaprekar constant>. All natural numbers less than 10,000 (except som...

bijna 13 jaar ago | 27 | 2295 solvers