Cody Challenge

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	7	1227
Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning	8	660
Alphabetize by last name Created by: Cody Team Tags regexp, sorting	7	733
Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	718
Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	17	690
Find common elements in matrix rows Created by: Cody Team Tags matlab	8	743
Find the two-word state names Created by: Cody Team Tags states, regexp	2	526
Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	5	385
The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	11	913
Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	1	490
Elapsed Time Created by: Cody Team Tags time	10	1355
Find state names that end with the letter A Created by: Cody Team Tags regexp, states	5	521
The Goldbach Conjecture Created by: Cody Team Tags primes	46	3188
Pattern matching Created by: Cody Team Tags indexing	10	1066
Tic Tac Toe FTW Created by: Cody Team Tags game, tic tac toe, fun	13	513
Summing Digits within Text Created by: Cody Team Tags strings	5	1012
Scrabble Scores Created by: Cody Team Tags strings, scrabble	7	688
Counting Sequence Created by: Cody Team Tags encoding	8	607
Maximum running product for a string of numbers Created by: Cody Team Tags matlab, sequences, poor_test_suite	5	775
Duplicates Created by: Cody Team Tags matlab, strings, sets	3	815
What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	18	402
Find the two most distant points Created by: Cody Team Tags distance	4	1174
QWERTY coordinates Created by: Cody Team Tags indexing	4	929
Knight's Tour Checker Created by: Cody Team Tags matlab	11	342
Given two strings, find the maximum overlap Created by: Cody Team Tags matlab	7	286
Target sorting Created by: Cody Team Tags matlab, sorting	21	2856
Calculate the Levenshtein distance between two strings Created by: Cody Team Tags matlab, string metric	6	288
Find state names that start with the letter N Created by: Cody Team Tags regexp, states	1	441
Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	0	397
Connect Four Win Checker Created by: Cody Team Tags matlab, game	12	317
Counting in Finnish Created by: Cody Team Tags strings, finnish	6	505
It dseon't mettar waht oedrr the lrettes in a wrod are. Created by: Cody Team Tags strings, regexp	7	475
Indexed Probability Table Created by: Cody Team Tags matlab	3	1004
Renaming a field in a structure array Created by: Cody Team Tags matlab	5	521
Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	1	429
Longest Divisor Run Created by: Cody Team Tags matlab	6	323
Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	10	514
Remove the small words from a list of words. Created by: Cody Team Tags matlab	4	452
Mandelbrot Numbers Created by: Cody Team Tags matlab, fractals	4	397
Test for balanced parentheses Created by: Cody Team Tags parens, regexp	10	708
DNA N-Gram Distribution Created by: Cody Team Tags matlab	3	381
Implement a ROT13 cipher Created by: Cody Team Tags matlab, lookup table, cipher	7	629
Clean the List of Names Created by: Cody Team Tags strings	1	592
De-dupe Created by: Cody Team Tags matlab	8	1466
Find the palindrome Created by: Cody Team Tags strings	4	449
Balanced number Created by: Cody Team Tags matlab	16	1536
Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	1649
Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	51	5781
Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	50	822
Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	44	6787
Remove the vowels Created by: Cody Team Tags regexp, siam	12	3750
Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	53	4993
Summing digits Created by: Cody Team Tags strings	22	4652
Swap the first and last columns Created by: Cody Team Tags matlab 101, siam, math	32	9359
Bullseye Matrix Created by: Cody Team Tags matrices	61	3282
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	11152
Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	16	2978
Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags diff, strings, regexp	30	2310
Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	26	5701
Remove all the consonants Created by: Cody Team Tags regexp, basics	7	2409
Fibonacci sequence Created by: Cody Team Tags sequences, siam, fibonacci	56	7991
Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	45	8765
Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	47	5413
Add two numbers Created by: Cody Team Tags matlab 101, siam, basic matlab	58	21486
Select every other element of a vector Created by: Cody Team Tags vectors, indexing, matlab 101	61	15328
Triangle Numbers Created by: Cody Team Tags math, triangle	50	13349
Make a checkerboard matrix Created by: Cody Team Tags matrices, square	144	10202
Find the sum of all the numbers of the input vector Created by: Cody Team Tags easy, matlab 101, vector	53	24028
Make the vector [1 2 3 4 5 6 7 8 9 10] Created by: Cody Team Tags basic, colon, x=1:10	81	27786
Times 2 - START HERE Created by: Cody Team Tags intro, math, basics	115	33713
Sums with Excluded Digits Created by: Cody Team Tags strings	9	948
Making change Created by: Cody Team Tags money	12	1556
Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	935
Which doors are open? Created by: Cody Team Tags matlab, iteration	18	1716
Make a Palindrome Number Created by: Cody Team Tags strings	9	1096
Trimming Spaces Created by: Cody Team Tags strings, whitespace	5	1130
Subset Sum Created by: Cody Team Tags matlab	17	703
Find the alphabetic word product Created by: Cody Team Tags matlab	6	1950
Cell joiner Created by: Cody Team Tags matlab, strings	10	2162
Reverse Run-Length Encoder Created by: Cody Team Tags encoding	9	1266
Which values occur exactly three times? Created by: Cody Team Tags search	14	3212
Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	10	1181
Pascal's Triangle Created by: Cody Team Tags combinatorics, math	13	2428
Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	613
Quote Doubler Created by: Cody Team Tags strings, regexp, quotes	5	1491
Binary numbers Created by: Cody Team Tags matlab	17	1838
Create times-tables Created by: Cody Team Tags matrices	42	7259
Most nonzero elements in row Created by: Cody Team Tags matrices	27	5014
Remove all the words that end with "ain" Created by: Cody Team Tags regexp, strings, matlab 101	11	984
Sort a list of complex numbers based on far they are from the origin. Created by: Cody Team Tags sorting, basic matlab	16	3671
Nearest Numbers Created by: Cody Team Tags vectors, distance	24	2637
Counting Money Created by: Cody Team Tags regexp, strings	7	1857
Pangrams! Created by: Cody Team Tags strings	20	1891
Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	83	16455

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