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
Problem 72. Interpolator Created by: Cody Team Tags interpolation	9	1416
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	13	901
Problem 70. Alphabetize by last name Created by: Cody Team Tags regexp, sorting	8	870
Problem 69. Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	847
Problem 68. Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	15	804
Problem 67. Find common elements in matrix rows Created by: Cody Team Tags matlab	8	871
Problem 66. Find the two-word state names Created by: Cody Team Tags states, regexp	2	598
Problem 65. Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	454
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	12	1011
Problem 63. Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	0	558
Problem 62. Elapsed Time Created by: Cody Team Tags time	11	1470
Problem 61. Find state names that end with the letter A Created by: Cody Team Tags regexp, states	5	585
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	46	3429
Problem 59. Pattern matching Created by: Cody Team Tags indexing	8	1233
Problem 58. Tic Tac Toe FTW Created by: Cody Team Tags game, tic tac toe, fun	13	592
Problem 57. Summing Digits within Text Created by: Cody Team Tags strings	6	1108
Problem 56. Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	762
Problem 55. Counting Sequence Created by: Cody Team Tags encoding	9	686
Problem 54. Maximum running product for a string of numbers Created by: Cody Team Tags matlab, sequences, poor_test_suite	4	886
Problem 53. Duplicates Created by: Cody Team Tags matlab, strings, sets	3	903
Problem 52. What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	16	464
Problem 51. Find the two most distant points Created by: Cody Team Tags distance	5	1314
Problem 50. QWERTY coordinates Created by: Cody Team Tags indexing	3	1015
Problem 96. Knight's Tour Checker Created by: Cody Team Tags matlab	12	402
Problem 95. Given two strings, find the maximum overlap Created by: Cody Team Tags matlab	7	357
Problem 94. Target sorting Created by: Cody Team Tags matlab, sorting	20	3043
Problem 93. Calculate the Levenshtein distance between two strings Created by: Cody Team Tags matlab, string metric	10	335
Problem 92. Find state names that start with the letter N Created by: Cody Team Tags regexp, states	1	487
Problem 91. Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	1	436
Problem 90. Connect Four Win Checker Created by: Cody Team Tags matlab, game	11	367
Problem 89. Counting in Finnish Created by: Cody Team Tags strings, finnish	7	548
Problem 88. It dseon't mettar waht oedrr the lrettes in a wrod are. Created by: Cody Team Tags strings, regexp	7	518
Problem 87. Indexed Probability Table Created by: Cody Team Tags matlab	3	1113
Problem 86. Renaming a field in a structure array Created by: Cody Team Tags matlab	5	568
Problem 85. Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	1	476
Problem 84. Longest Divisor Run Created by: Cody Team Tags matlab	4	369
Problem 83. Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	12	615
Problem 82. Remove the small words from a list of words. Created by: Cody Team Tags matlab	3	506
Problem 81. Mandelbrot Numbers Created by: Cody Team Tags matlab, fractals	4	443
Problem 80. Test for balanced parentheses Created by: Cody Team Tags parens, regexp	8	756
Problem 79. DNA N-Gram Distribution Created by: Cody Team Tags matlab	3	427
Problem 78. Implement a ROT13 cipher Created by: Cody Team Tags matlab, lookup table, cipher	6	678
Problem 77. Clean the List of Names Created by: Cody Team Tags strings	1	643
Problem 76. De-dupe Created by: Cody Team Tags matlab	7	1564
Problem 75. Find the palindrome Created by: Cody Team Tags strings	4	495
Problem 74. Balanced number Created by: Cody Team Tags matlab	14	1636
Problem 73. Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	1771
Problem 25. Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	54	6177
Problem 24. Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	41	903
Problem 23. Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	51	7625
Problem 22. Remove the vowels Created by: Cody Team Tags regexp, siam	14	4044
Problem 21. Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	52	5424
Problem 20. Summing digits Created by: Cody Team Tags strings	21	5038
Problem 19. Swap the first and last columns Created by: Cody Team Tags matlab 101, siam, math	39	10279
Problem 18. Bullseye Matrix Created by: Cody Team Tags matrices	64	3565
Problem 17. 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	11910
Problem 16. Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	16	3241
Problem 15. Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags diff, strings, regexp	33	2574
Problem 14. Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	28	6126
Problem 13. Remove all the consonants Created by: Cody Team Tags regexp, basics	9	2639
Problem 12. Fibonacci sequence Created by: Cody Team Tags sequences, siam, fibonacci	57	8702
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	47	9646
Problem 9. Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	48	5950
Problem 8. Add two numbers Created by: Cody Team Tags matlab 101, siam, basic matlab	63	23921
Problem 6. Select every other element of a vector Created by: Cody Team Tags vectors, indexing, matlab 101	71	17037
Problem 5. Triangle Numbers Created by: Cody Team Tags math, triangle	61	14792
Problem 4. Make a checkerboard matrix Created by: Cody Team Tags matrices, square	144	11137
Problem 3. Find the sum of all the numbers of the input vector Created by: Cody Team Tags easy, matlab 101, vector	64	26990
Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10] Created by: Cody Team Tags basic, colon, x=1:10	87	30756
Problem 1. Times 2 - START HERE Created by: Cody Team Tags intro, math, basics	125	39995
Problem 49. Sums with Excluded Digits Created by: Cody Team Tags strings	8	1025
Problem 48. Making change Created by: Cody Team Tags money	11	1728
Problem 47. Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	1003
Problem 46. Which doors are open? Created by: Cody Team Tags matlab, iteration	17	1854
Problem 45. Make a Palindrome Number Created by: Cody Team Tags strings	10	1182
Problem 44. Trimming Spaces Created by: Cody Team Tags strings, whitespace	5	1207
Problem 43. Subset Sum Created by: Cody Team Tags matlab	14	765
Problem 42. Find the alphabetic word product Created by: Cody Team Tags matlab	5	2059
Problem 41. Cell joiner Created by: Cody Team Tags matlab, strings	10	2321
Problem 40. Reverse Run-Length Encoder Created by: Cody Team Tags encoding	8	1366
Problem 39. Which values occur exactly three times? Created by: Cody Team Tags search	12	3397
Problem 38. Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	7	1280
Problem 37. Pascal's Triangle Created by: Cody Team Tags combinatorics, math	14	2597
Problem 36. Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	669
Problem 35. Quote Doubler Created by: Cody Team Tags strings, regexp, quotes	6	1590
Problem 34. Binary numbers Created by: Cody Team Tags matlab	20	1996
Problem 33. Create times-tables Created by: Cody Team Tags matrices	40	7983
Problem 32. Most nonzero elements in row Created by: Cody Team Tags matrices	27	5304
Problem 31. Remove all the words that end with "ain" Created by: Cody Team Tags regexp, strings, matlab 101	14	1081
Problem 30. Sort a list of complex numbers based on far they are from the origin. Created by: Cody Team Tags sorting, basic matlab	17	3905
Problem 29. Nearest Numbers Created by: Cody Team Tags vectors, distance	27	2836
Problem 28. Counting Money Created by: Cody Team Tags regexp, strings	8	2020
Problem 27. Pangrams! Created by: Cody Team Tags strings	22	2060
Problem 26. Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	90	17630

Recent Group Finishers211

Recent Activity

	Simon Hönes submitted Solution 2180143 to Problem 64. The Goldbach Conjecture, Part 2 1 hour and 17 minutes ago
	Matteo Tossuto submitted Solution 2180135 to Problem 8. Add two numbers 1 hour and 28 minutes ago
	Matteo Tossuto submitted Solution 2180111 to Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10] 1 hour and 41 minutes ago
	Matteo Tossuto submitted Solution 2180115 to Problem 3. Find the sum of all the numbers of the input vector 2 hours and 34 minutes ago
	Matteo Tossuto submitted Solution 2180113 to Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10] 2 hours and 37 minutes ago