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	1494
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	13	906
Problem 70. Alphabetize by last name Created by: Cody Team Tags regexp, sorting	8	879
Problem 69. Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	853
Problem 68. Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	15	808
Problem 67. Find common elements in matrix rows Created by: Cody Team Tags matlab	8	877
Problem 66. Find the two-word state names Created by: Cody Team Tags states, regexp	2	600
Problem 65. Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	457
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	12	1014
Problem 63. Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	0	562
Problem 62. Elapsed Time Created by: Cody Team Tags time	11	1475
Problem 61. Find state names that end with the letter A Created by: Cody Team Tags regexp, states	5	588
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	46	3434
Problem 59. Pattern matching Created by: Cody Team Tags indexing	8	1240
Problem 58. Tic Tac Toe FTW Created by: Cody Team Tags game, tic tac toe, fun	14	594
Problem 57. Summing Digits within Text Created by: Cody Team Tags strings	6	1115
Problem 56. Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	765
Problem 55. Counting Sequence Created by: Cody Team Tags encoding	9	688
Problem 54. Maximum running product for a string of numbers Created by: Cody Team Tags matlab, sequences, poor_test_suite	4	889
Problem 53. Duplicates Created by: Cody Team Tags matlab, strings, sets	3	906
Problem 52. What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	16	465
Problem 51. Find the two most distant points Created by: Cody Team Tags distance	5	1319
Problem 50. QWERTY coordinates Created by: Cody Team Tags indexing	3	1016
Problem 96. Knight's Tour Checker Created by: Cody Team Tags matlab, chess	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	3047
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	488
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	368
Problem 89. Counting in Finnish Created by: Cody Team Tags strings, finnish	7	549
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	1114
Problem 86. Renaming a field in a structure array Created by: Cody Team Tags matlab	5	570
Problem 85. Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	1	477
Problem 84. Longest Divisor Run Created by: Cody Team Tags matlab	4	368
Problem 83. Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	12	619
Problem 82. Remove the small words from a list of words. Created by: Cody Team Tags matlab	3	507
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	759
Problem 79. DNA N-Gram Distribution Created by: Cody Team Tags matlab	3	429
Problem 78. Implement a ROT13 cipher Created by: Cody Team Tags matlab, lookup table, cipher	6	680
Problem 77. Clean the List of Names Created by: Cody Team Tags strings	1	645
Problem 76. De-dupe Created by: Cody Team Tags matlab	7	1570
Problem 75. Find the palindrome Created by: Cody Team Tags strings	4	499
Problem 74. Balanced number Created by: Cody Team Tags matlab	14	1641
Problem 73. Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	1778
Problem 25. Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	54	6188
Problem 24. Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	41	905
Problem 23. Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	51	7679
Problem 22. Remove the vowels Created by: Cody Team Tags regexp, siam	14	4055
Problem 21. Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	52	5465
Problem 20. Summing digits Created by: Cody Team Tags strings	21	5051
Problem 19. Swap the first and last columns Created by: Cody Team Tags matlab 101, siam, math	39	10341
Problem 18. Bullseye Matrix Created by: Cody Team Tags matrices	65	3574
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	11949
Problem 16. Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	16	3249
Problem 15. Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags diff, strings, regexp	33	2590
Problem 14. Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	28	6143
Problem 13. Remove all the consonants Created by: Cody Team Tags regexp, basics	9	2648
Problem 12. Fibonacci sequence Created by: Cody Team Tags sequences, siam, fibonacci	57	8735
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	47	9703
Problem 9. Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	48	5975
Problem 8. Add two numbers Created by: Cody Team Tags matlab 101, siam, basic matlab	64	24099
Problem 6. Select every other element of a vector Created by: Cody Team Tags vectors, indexing, matlab 101	71	17160
Problem 5. Triangle Numbers Created by: Cody Team Tags math, triangle	61	14893
Problem 4. Make a checkerboard matrix Created by: Cody Team Tags matrices, square	144	11187
Problem 3. Find the sum of all the numbers of the input vector Created by: Cody Team Tags easy, matlab 101, vector	64	27220
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	30988
Problem 1. Times 2 - START HERE Created by: Cody Team Tags intro, math, basics	126	40659
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	1729
Problem 47. Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	1005
Problem 46. Which doors are open? Created by: Cody Team Tags matlab, iteration	17	1856
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	1209
Problem 43. Subset Sum Created by: Cody Team Tags matlab	14	766
Problem 42. Find the alphabetic word product Created by: Cody Team Tags matlab	5	2061
Problem 41. Cell joiner Created by: Cody Team Tags matlab, strings	10	2336
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	3400
Problem 38. Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	7	1282
Problem 37. Pascal's Triangle Created by: Cody Team Tags combinatorics, math	14	2599
Problem 36. Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	670
Problem 35. Quote Doubler Created by: Cody Team Tags strings, regexp, quotes	6	1594
Problem 34. Binary numbers Created by: Cody Team Tags matlab	20	2002
Problem 33. Create times-tables Created by: Cody Team Tags matrices	40	8030
Problem 32. Most nonzero elements in row Created by: Cody Team Tags matrices	27	5315
Problem 31. Remove all the words that end with "ain" Created by: Cody Team Tags regexp, strings, matlab 101	14	1090
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	3911
Problem 29. Nearest Numbers Created by: Cody Team Tags vectors, distance	27	2841
Problem 28. Counting Money Created by: Cody Team Tags regexp, strings	8	2023
Problem 27. Pangrams! Created by: Cody Team Tags strings	22	2064
Problem 26. Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	90	17698

Recent Group Finishers210

Recent Activity

	Jerry Wright submitted Solution 2202875 to Problem 26. Determine if input is odd 7 minutes ago
	Jerry Wright submitted Solution 2202868 to Problem 4. Make a checkerboard matrix 12 minutes ago
	Brian Kelley submitted Solution 2202842 to Problem 5. Triangle Numbers 28 minutes ago
	Jerry Wright submitted Solution 2202808 to Problem 17. Find all elements less than 0 or greater than 10 and replace them with NaN 43 minutes ago
	Brian Kelley submitted Solution 2202809 to Problem 4. Make a checkerboard matrix 43 minutes ago