Cody Challenge (Public)

Basic to advanced MATLAB problems created by the Cody Team at MathWorks.
A great starting place for new Cody players! 

Cody Challenge Master

+50 points

Problem Title	Likes	Solvers
Interpolator Created by: Cody Team Tags interpolation	4	1113
Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning	6	612
Alphabetize by last name Created by: Cody Team Tags regexp, sorting	6	685
Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	8	673
Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	16	652
Find common elements in matrix rows Created by: Cody Team Tags matlab	7	704
Find the two-word state names Created by: Cody Team Tags states, regexp	1	503
Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	371
The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	9	879
Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	1	475
Elapsed Time Created by: Cody Team Tags time	9	1311
Find state names that end with the letter A Created by: Cody Team Tags regexp, states	4	504
The Goldbach Conjecture Created by: Cody Team Tags primes	46	3111
Pattern matching Created by: Cody Team Tags indexing	9	1036
Tic Tac Toe FTW Created by: Cody Team Tags game, tic tac toe, fun	12	499
Summing Digits within Text Created by: Cody Team Tags strings	4	982
Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	666
Counting Sequence Created by: Cody Team Tags encoding	6	588
Maximum running product for a string of numbers Created by: Cody Team Tags matlab, sequences, poor_test_suite	5	754
Duplicates Created by: Cody Team Tags matlab, strings, sets	3	788
What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	17	386
Find the two most distant points Created by: Cody Team Tags distance	4	1133
QWERTY coordinates Created by: Cody Team Tags indexing	4	906
Knight's Tour Checker Created by: Cody Team Tags matlab	10	332
Given two strings, find the maximum overlap Created by: Cody Team Tags matlab	7	280
Target sorting Created by: Cody Team Tags matlab, sorting	21	2799
Calculate the Levenshtein distance between two strings Created by: Cody Team Tags matlab, string metric	6	285
Find state names that start with the letter N Created by: Cody Team Tags regexp, states	1	426
Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	0	387
Connect Four Win Checker Created by: Cody Team Tags matlab, game	11	309
Counting in Finnish Created by: Cody Team Tags strings, finnish	5	493
It dseon't mettar waht oedrr the lrettes in a wrod are. Created by: Cody Team Tags strings, regexp	6	465
Indexed Probability Table Created by: Cody Team Tags matlab	2	979
Renaming a field in a structure array Created by: Cody Team Tags matlab	4	512
Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	0	417
Longest Divisor Run Created by: Cody Team Tags matlab	5	320
Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	9	498
Remove the small words from a list of words. Created by: Cody Team Tags matlab	3	441
Mandelbrot Numbers Created by: Cody Team Tags matlab, fractals	3	387
Test for balanced parentheses Created by: Cody Team Tags parens, regexp	9	695
DNA N-Gram Distribution Created by: Cody Team Tags matlab	2	372
Implement a ROT13 cipher Created by: Cody Team Tags matlab, lookup table, cipher	6	618
Clean the List of Names Created by: Cody Team Tags strings	0	581
De-dupe Created by: Cody Team Tags matlab	8	1430
Find the palindrome Created by: Cody Team Tags strings	3	442
Balanced number Created by: Cody Team Tags matlab	15	1500
Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	10	1614
Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	50	5670
Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	48	811
Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	41	6507
Remove the vowels Created by: Cody Team Tags regexp, siam	12	3683
Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	48	4894
Summing digits Created by: Cody Team Tags strings	22	4569
Swap the first and last columns Created by: Cody Team Tags matlab 101, siam, math	31	9109
Bullseye Matrix Created by: Cody Team Tags matrices	59	3215
Find all elements less than 0 or greater than 10 and replace them with NaN Created by: Cody Team Tags data cleaning, basic matlab	36	10976
Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	16	2928
Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags diff, strings, regexp	29	2244
Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	24	5599
Remove all the consonants Created by: Cody Team Tags regexp, basics	7	2363
Fibonacci sequence Created by: Cody Team Tags sequences, siam, fibonacci	56	7867
Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	44	8542
Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	47	5327
Add two numbers Created by: Cody Team Tags matlab 101, siam, basic matlab	55	20553
Select every other element of a vector Created by: Cody Team Tags vectors, indexing, matlab 101	58	14947
Triangle Numbers Created by: Cody Team Tags math, triangle	50	12999
Make a checkerboard matrix Created by: Cody Team Tags matrices, square	141	10046
Find the sum of all the numbers of the input vector Created by: Cody Team Tags easy, matlab 101, vector	50	23256
Make the vector [1 2 3 4 5 6 7 8 9 10] Created by: Cody Team Tags basic, colon, x=1:10	81	27119
Times 2 - START HERE Created by: Cody Team Tags intro, math, basics	112	33054
Sums with Excluded Digits Created by: Cody Team Tags strings	7	926
Making change Created by: Cody Team Tags money	11	1519
Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	917
Which doors are open? Created by: Cody Team Tags matlab, iteration	17	1669
Make a Palindrome Number Created by: Cody Team Tags strings	8	1072
Trimming Spaces Created by: Cody Team Tags strings, whitespace	4	1105
Subset Sum Created by: Cody Team Tags matlab	16	688
Find the alphabetic word product Created by: Cody Team Tags matlab	6	1913
Cell joiner Created by: Cody Team Tags matlab, strings	10	2114
Reverse Run-Length Encoder Created by: Cody Team Tags encoding	8	1242
Which values occur exactly three times? Created by: Cody Team Tags search	14	3161
Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	10	1161
Pascal's Triangle Created by: Cody Team Tags combinatorics, math	13	2372
Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	3	598
Quote Doubler Created by: Cody Team Tags strings, regexp, quotes	5	1462
Binary numbers Created by: Cody Team Tags matlab	16	1801
Create times-tables Created by: Cody Team Tags matrices	41	7050
Most nonzero elements in row Created by: Cody Team Tags matrices	27	4934
Remove all the words that end with "ain" Created by: Cody Team Tags regexp, strings, matlab 101	10	957
Sort a list of complex numbers based on far they are from the origin. Created by: Cody Team Tags sorting, basic matlab	16	3603
Nearest Numbers Created by: Cody Team Tags vectors, distance	24	2578
Counting Money Created by: Cody Team Tags regexp, strings	7	1809
Pangrams! Created by: Cody Team Tags strings	17	1840
Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	81	16130

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