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	828
Problem 72. Interpolator Created by: Cody Team Tags interpolation	8	1329
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	11	828
Problem 70. Alphabetize by last name Created by: Cody Team Tags regexp, sorting	8	816
Problem 69. Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	808
Problem 68. Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	14	763
Problem 67. Find common elements in matrix rows Created by: Cody Team Tags matlab	8	826
Problem 66. Find the two-word state names Created by: Cody Team Tags states, regexp	2	568
Problem 65. Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	426
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	12	973
Problem 63. Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	0	532
Problem 62. Elapsed Time Created by: Cody Team Tags time	11	1417
Problem 61. Find state names that end with the letter A Created by: Cody Team Tags regexp, states	5	564
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	45	3333
Problem 59. Pattern matching Created by: Cody Team Tags indexing	8	1168
Problem 58. Tic Tac Toe FTW Created by: Cody Team Tags game, tic tac toe, fun	13	562
Problem 57. Summing Digits within Text Created by: Cody Team Tags strings	6	1072
Problem 56. Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	733
Problem 55. Counting Sequence Created by: Cody Team Tags encoding	9	660
Problem 54. Maximum running product for a string of numbers Created by: Cody Team Tags matlab, sequences, poor_test_suite	4	832
Problem 53. Duplicates Created by: Cody Team Tags matlab, strings, sets	3	863
Problem 52. What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	16	430
Problem 51. Find the two most distant points Created by: Cody Team Tags distance	5	1254
Problem 50. QWERTY coordinates Created by: Cody Team Tags indexing	2	971
Problem 96. Knight's Tour Checker Created by: Cody Team Tags matlab	12	375
Problem 95. Given two strings, find the maximum overlap Created by: Cody Team Tags matlab	7	310
Problem 94. Target sorting Created by: Cody Team Tags matlab, sorting	20	2962
Problem 93. Calculate the Levenshtein distance between two strings Created by: Cody Team Tags matlab, string metric	9	310
Problem 92. Find state names that start with the letter N Created by: Cody Team Tags regexp, states	1	473
Problem 91. Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	1	425
Problem 90. Connect Four Win Checker Created by: Cody Team Tags matlab, game	11	343
Problem 89. Counting in Finnish Created by: Cody Team Tags strings, finnish	7	534
Problem 88. It dseon't mettar waht oedrr the lrettes in a wrod are. Created by: Cody Team Tags strings, regexp	7	502
Problem 87. Indexed Probability Table Created by: Cody Team Tags matlab	3	1061
Problem 86. Renaming a field in a structure array Created by: Cody Team Tags matlab	5	550
Problem 85. Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	1	455
Problem 84. Longest Divisor Run Created by: Cody Team Tags matlab	4	346
Problem 83. Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	12	563
Problem 82. Remove the small words from a list of words. Created by: Cody Team Tags matlab	3	482
Problem 81. Mandelbrot Numbers Created by: Cody Team Tags matlab, fractals	4	422
Problem 80. Test for balanced parentheses Created by: Cody Team Tags parens, regexp	8	739
Problem 79. DNA N-Gram Distribution Created by: Cody Team Tags matlab	3	403
Problem 78. Implement a ROT13 cipher Created by: Cody Team Tags matlab, lookup table, cipher	6	658
Problem 77. Clean the List of Names Created by: Cody Team Tags strings	1	622
Problem 76. De-dupe Created by: Cody Team Tags matlab	7	1528
Problem 75. Find the palindrome Created by: Cody Team Tags strings	4	475
Problem 74. Balanced number Created by: Cody Team Tags matlab	14	1593
Problem 73. Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	1728
Problem 25. Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	54	6080
Problem 24. Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	40	858
Problem 23. Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	48	7413
Problem 22. Remove the vowels Created by: Cody Team Tags regexp, siam	14	3916
Problem 21. Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	51	5315
Problem 20. Summing digits Created by: Cody Team Tags strings	21	4937
Problem 19. Swap the first and last columns Created by: Cody Team Tags matlab 101, siam, math	35	10050
Problem 18. Bullseye Matrix Created by: Cody Team Tags matrices	62	3459
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	11709
Problem 16. Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	16	3151
Problem 15. Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags diff, strings, regexp	31	2485
Problem 14. Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	28	6010
Problem 13. Remove all the consonants Created by: Cody Team Tags regexp, basics	9	2567
Problem 12. Fibonacci sequence Created by: Cody Team Tags sequences, siam, fibonacci	55	8503
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	47	9428
Problem 9. Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	47	5762
Problem 8. Add two numbers Created by: Cody Team Tags matlab 101, siam, basic matlab	63	23323
Problem 6. Select every other element of a vector Created by: Cody Team Tags vectors, indexing, matlab 101	65	16535
Problem 5. Triangle Numbers Created by: Cody Team Tags math, triangle	55	14425
Problem 4. Make a checkerboard matrix Created by: Cody Team Tags matrices, square	140	10865
Problem 3. Find the sum of all the numbers of the input vector Created by: Cody Team Tags easy, matlab 101, vector	60	26105
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	29859
Problem 1. Times 2 - START HERE Created by: Cody Team Tags intro, math, basics	118	37411
Problem 49. Sums with Excluded Digits Created by: Cody Team Tags strings	8	995
Problem 48. Making change Created by: Cody Team Tags money	11	1671
Problem 47. Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	975
Problem 46. Which doors are open? Created by: Cody Team Tags matlab, iteration	17	1797
Problem 45. Make a Palindrome Number Created by: Cody Team Tags strings	10	1146
Problem 44. Trimming Spaces Created by: Cody Team Tags strings, whitespace	5	1176
Problem 43. Subset Sum Created by: Cody Team Tags matlab	14	742
Problem 42. Find the alphabetic word product Created by: Cody Team Tags matlab	5	2012
Problem 41. Cell joiner Created by: Cody Team Tags matlab, strings	10	2255
Problem 40. Reverse Run-Length Encoder Created by: Cody Team Tags encoding	8	1325
Problem 39. Which values occur exactly three times? Created by: Cody Team Tags search	12	3331
Problem 38. Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	6	1240
Problem 37. Pascal's Triangle Created by: Cody Team Tags combinatorics, math	14	2534
Problem 36. Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	651
Problem 35. Quote Doubler Created by: Cody Team Tags strings, regexp, quotes	6	1540
Problem 34. Binary numbers Created by: Cody Team Tags matlab	20	1932
Problem 33. Create times-tables Created by: Cody Team Tags matrices	39	7806
Problem 32. Most nonzero elements in row Created by: Cody Team Tags matrices	27	5212
Problem 31. Remove all the words that end with "ain" Created by: Cody Team Tags regexp, strings, matlab 101	14	1040
Problem 30. Sort a list of complex numbers based on far they are from the origin. Created by: Cody Team Tags sorting, basic matlab	16	3817
Problem 29. Nearest Numbers Created by: Cody Team Tags vectors, distance	25	2749
Problem 28. Counting Money Created by: Cody Team Tags regexp, strings	8	1959
Problem 27. Pangrams! Created by: Cody Team Tags strings	22	1985
Problem 26. Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	90	17291

Recent Group Finishers199

Recent Activity

	Ellen Kasradze submitted Solution 2097751 to Problem 3. Find the sum of all the numbers of the input vector 6 hours and 18 minutes ago
	Ellen Kasradze submitted Solution 2097743 to Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10] 6 hours and 43 minutes ago
	William Rickman submitted Solution 2097713 to Problem 56. Scrabble Scores 7 hours and 17 minutes ago
	William Rickman submitted Solution 2097705 to Problem 57. Summing Digits within Text 7 hours and 30 minutes ago
	William Rickman submitted Solution 2097696 to Problem 61. Find state names that end with the letter A 7 hours and 39 minutes ago