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 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	11	797
Problem 72. Interpolator Created by: Cody Team Tags interpolation	8	1312
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	11	797
Problem 70. Alphabetize by last name Created by: Cody Team Tags regexp, sorting	6	797
Problem 69. Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	791
Problem 68. Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	13	747
Problem 67. Find common elements in matrix rows Created by: Cody Team Tags matlab	8	810
Problem 66. Find the two-word state names Created by: Cody Team Tags states, regexp	2	559
Problem 65. Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	415
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	12	961
Problem 63. Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	0	522
Problem 62. Elapsed Time Created by: Cody Team Tags time	10	1401
Problem 61. Find state names that end with the letter A Created by: Cody Team Tags regexp, states	5	551
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	44	3308
Problem 59. Pattern matching Created by: Cody Team Tags indexing	8	1103
Problem 58. Tic Tac Toe FTW Created by: Cody Team Tags game, tic tac toe, fun	12	551
Problem 57. Summing Digits within Text Created by: Cody Team Tags strings	5	1055
Problem 56. Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	721
Problem 55. Counting Sequence Created by: Cody Team Tags encoding	8	647
Problem 54. Maximum running product for a string of numbers Created by: Cody Team Tags matlab, sequences, poor_test_suite	4	816
Problem 53. Duplicates Created by: Cody Team Tags matlab, strings, sets	3	851
Problem 52. What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	16	422
Problem 51. Find the two most distant points Created by: Cody Team Tags distance	4	1236
Problem 50. QWERTY coordinates Created by: Cody Team Tags indexing	2	960
Problem 96. Knight's Tour Checker Created by: Cody Team Tags matlab	12	364
Problem 95. Given two strings, find the maximum overlap Created by: Cody Team Tags matlab	6	300
Problem 94. Target sorting Created by: Cody Team Tags matlab, sorting	20	2935
Problem 93. Calculate the Levenshtein distance between two strings Created by: Cody Team Tags matlab, string metric	8	304
Problem 92. Find state names that start with the letter N Created by: Cody Team Tags regexp, states	1	465
Problem 91. Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	1	417
Problem 90. Connect Four Win Checker Created by: Cody Team Tags matlab, game	10	332
Problem 89. Counting in Finnish Created by: Cody Team Tags strings, finnish	7	525
Problem 88. It dseon't mettar waht oedrr the lrettes in a wrod are. Created by: Cody Team Tags strings, regexp	7	494
Problem 87. Indexed Probability Table Created by: Cody Team Tags matlab	3	1047
Problem 86. Renaming a field in a structure array Created by: Cody Team Tags matlab	5	542
Problem 85. Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	1	447
Problem 84. Longest Divisor Run Created by: Cody Team Tags matlab	4	339
Problem 83. Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	12	552
Problem 82. Remove the small words from a list of words. Created by: Cody Team Tags matlab	3	474
Problem 81. Mandelbrot Numbers Created by: Cody Team Tags matlab, fractals	4	415
Problem 80. Test for balanced parentheses Created by: Cody Team Tags parens, regexp	8	729
Problem 79. DNA N-Gram Distribution Created by: Cody Team Tags matlab	3	397
Problem 78. Implement a ROT13 cipher Created by: Cody Team Tags matlab, lookup table, cipher	6	650
Problem 77. Clean the List of Names Created by: Cody Team Tags strings	1	616
Problem 76. De-dupe Created by: Cody Team Tags matlab	7	1514
Problem 75. Find the palindrome Created by: Cody Team Tags strings	4	468
Problem 74. Balanced number Created by: Cody Team Tags matlab	14	1579
Problem 73. Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	1710
Problem 25. Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	53	5979
Problem 24. Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	39	847
Problem 23. Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	46	7267
Problem 22. Remove the vowels Created by: Cody Team Tags regexp, siam	14	3878
Problem 21. Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	51	5205
Problem 20. Summing digits Created by: Cody Team Tags strings	21	4840
Problem 19. Swap the first and last columns Created by: Cody Team Tags matlab 101, siam, math	34	9897
Problem 18. Bullseye Matrix Created by: Cody Team Tags matrices	60	3418
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	35	11623
Problem 16. Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	16	3115
Problem 15. Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags diff, strings, regexp	30	2443
Problem 14. Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	28	5908
Problem 13. Remove all the consonants Created by: Cody Team Tags regexp, basics	9	2529
Problem 12. Fibonacci sequence Created by: Cody Team Tags sequences, siam, fibonacci	55	8411
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	47	9263
Problem 9. Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	47	5700
Problem 8. Add two numbers Created by: Cody Team Tags matlab 101, siam, basic matlab	63	23018
Problem 6. Select every other element of a vector Created by: Cody Team Tags vectors, indexing, matlab 101	65	16234
Problem 5. Triangle Numbers Created by: Cody Team Tags math, triangle	55	14211
Problem 4. Make a checkerboard matrix Created by: Cody Team Tags matrices, square	139	10756
Problem 3. Find the sum of all the numbers of the input vector Created by: Cody Team Tags easy, matlab 101, vector	60	25653
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	81	29438
Problem 1. Times 2 - START HERE Created by: Cody Team Tags intro, math, basics	116	36313
Problem 49. Sums with Excluded Digits Created by: Cody Team Tags strings	8	986
Problem 48. Making change Created by: Cody Team Tags money	10	1610
Problem 47. Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	967
Problem 46. Which doors are open? Created by: Cody Team Tags matlab, iteration	17	1786
Problem 45. Make a Palindrome Number Created by: Cody Team Tags strings	10	1137
Problem 44. Trimming Spaces Created by: Cody Team Tags strings, whitespace	5	1166
Problem 43. Subset Sum Created by: Cody Team Tags matlab	14	735
Problem 42. Find the alphabetic word product Created by: Cody Team Tags matlab	5	1997
Problem 41. Cell joiner Created by: Cody Team Tags matlab, strings	10	2234
Problem 40. Reverse Run-Length Encoder Created by: Cody Team Tags encoding	8	1313
Problem 39. Which values occur exactly three times? Created by: Cody Team Tags search	12	3307
Problem 38. Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	6	1225
Problem 37. Pascal's Triangle Created by: Cody Team Tags combinatorics, math	13	2515
Problem 36. Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	645
Problem 35. Quote Doubler Created by: Cody Team Tags strings, regexp, quotes	6	1529
Problem 34. Binary numbers Created by: Cody Team Tags matlab	20	1914
Problem 33. Create times-tables Created by: Cody Team Tags matrices	39	7678
Problem 32. Most nonzero elements in row Created by: Cody Team Tags matrices	27	5171
Problem 31. Remove all the words that end with "ain" Created by: Cody Team Tags regexp, strings, matlab 101	13	1027
Problem 30. Sort a list of complex numbers based on far they are from the origin. Created by: Cody Team Tags sorting, basic matlab	15	3792
Problem 29. Nearest Numbers Created by: Cody Team Tags vectors, distance	24	2727
Problem 28. Counting Money Created by: Cody Team Tags regexp, strings	7	1936
Problem 27. Pangrams! Created by: Cody Team Tags strings	22	1964
Problem 26. Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	88	17145

Recent Group Finishers194

Recent Activity

	Sophia Nguyen submitted Solution 2053887 to Problem 67. Find common elements in matrix rows 4 minutes ago
	Agustín Rico submitted Solution 2053802 to Problem 72. Interpolator 4 hours and 48 minutes ago
	Michael Trevarrow submitted Solution 2053676 to Problem 15. Find the longest sequence of 1's in a binary sequence. 9 hours and 15 minutes ago
	Wenhao Chai submitted Solution 2053665 to Problem 21. Return the 3n+1 sequence for n 10 hours and 2 minutes ago
	Wenhao Chai submitted Solution 2053657 to Problem 20. Summing digits 10 hours and 10 minutes ago