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	10	2153
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	51	12341
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	14	1361
Problem 70. Alphabetize by last name Created by: Cody Team Tags regexp, sorting	9	1181
Problem 69. Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	1161
Problem 68. Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	15	1173
Problem 67. Find common elements in matrix rows Created by: Cody Team Tags matlab	9	1175
Problem 66. Find the two-word state names Created by: Cody Team Tags regexp, states	2	799
Problem 65. Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	647
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	12	1364
Problem 63. Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	1	797
Problem 62. Elapsed Time Created by: Cody Team Tags time	11	1862
Problem 61. Find state names that end with the letter A Created by: Cody Team Tags regexp, states	6	737
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	47	4713
Problem 59. Pattern matching Created by: Cody Team Tags indexing	8	1944
Problem 58. Tic Tac Toe FTW Created by: Cody Team Tags game, fun, tic tac toe	14	911
Problem 57. Summing Digits within Text Created by: Cody Team Tags strings	7	1396
Problem 56. Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	1095
Problem 55. Counting Sequence Created by: Cody Team Tags encoding	9	959
Problem 54. Maximum running product for a string of numbers Created by: Cody Team Tags sequences, matlab, poor_test_suite	4	1252
Problem 53. Duplicates Created by: Cody Team Tags strings, sets, matlab	3	1172
Problem 52. What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	20	745
Problem 51. Find the two most distant points Created by: Cody Team Tags distance	5	1809
Problem 50. QWERTY coordinates Created by: Cody Team Tags indexing	5	1365
Problem 96. Knight's Tour Checker Created by: Cody Team Tags matlab, chess	12	573
Problem 95. Given two strings, find the maximum overlap Created by: Cody Team Tags matlab	7	522
Problem 94. Target sorting Created by: Cody Team Tags sorting, matlab	21	3707
Problem 93. Calculate the Levenshtein distance between two strings Created by: Cody Team Tags matlab, string metric	12	558
Problem 92. Find state names that start with the letter N Created by: Cody Team Tags regexp, states	1	601
Problem 91. Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	1	540
Problem 90. Connect Four Win Checker Created by: Cody Team Tags matlab, game	13	578
Problem 89. Counting in Finnish Created by: Cody Team Tags strings, finnish	7	770
Problem 88. It dseon't mettar waht oedrr the lrettes in a wrod are. Created by: Cody Team Tags regexp, strings	7	668
Problem 87. Indexed Probability Table Created by: Cody Team Tags matlab	3	1518
Problem 86. Renaming a field in a structure array Created by: Cody Team Tags matlab	5	750
Problem 85. Remove the polynomials that have positive real elements of their roots. Created by: Cody Team Tags matlab	2	668
Problem 84. Longest Divisor Run Created by: Cody Team Tags matlab	4	558
Problem 83. Prime factor digits Created by: Cody Team Tags primes, poor_test_suite	12	850
Problem 82. Remove the small words from a list of words. Created by: Cody Team Tags matlab	3	685
Problem 81. Mandelbrot Numbers Created by: Cody Team Tags matlab, fractals	5	634
Problem 80. Test for balanced parentheses Created by: Cody Team Tags regexp, parens	8	1002
Problem 79. DNA N-Gram Distribution Created by: Cody Team Tags matlab	3	610
Problem 78. Implement a ROT13 cipher Created by: Cody Team Tags matlab, encoding, cipher	6	934
Problem 77. Clean the List of Names Created by: Cody Team Tags strings	1	846
Problem 76. De-dupe Created by: Cody Team Tags matlab	7	1901
Problem 75. Find the palindrome Created by: Cody Team Tags strings	4	724
Problem 74. Balanced number Created by: Cody Team Tags matlab	14	2196
Problem 73. Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	2223
Problem 25. Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	54	7615
Problem 24. Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	43	1275
Problem 23. Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	56	10073
Problem 22. Remove the vowels Created by: Cody Team Tags regexp, siam	15	5041
Problem 21. Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	53	7038
Problem 20. Summing digits Created by: Cody Team Tags strings	22	6124
Problem 19. Swap the first and last columns Created by: Cody Team Tags math, matlab 101, permutations	42	12799
Problem 18. Bullseye Matrix Created by: Cody Team Tags matrices	68	4783
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	39	15581
Problem 16. Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	17	4092
Problem 15. Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags regexp, diff, strings	35	3358
Problem 14. Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	28	7387
Problem 13. Remove all the consonants Created by: Cody Team Tags regexp, basics	11	3284
Problem 12. Fibonacci sequence Created by: Cody Team Tags sequences, fibonacci, siam	58	11607
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	51	12341
Problem 9. Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	50	7754
Problem 8. Add two numbers Created by: Cody Team Tags matlab 101, basic matlab, basics	70	30260
Problem 6. Select every other element of a vector Created by: Cody Team Tags vectors, matlab 101, indexing	75	21331
Problem 5. Triangle Numbers Created by: Cody Team Tags math, triangle, nice	65	19072
Problem 4. Make a checkerboard matrix Created by: Cody Team Tags matrices, square	146	15107
Problem 3. Find the sum of all the numbers of the input vector Created by: Cody Team Tags matlab 101, easy, vector	70	33934
Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10] Created by: Cody Team Tags basic, basics, colon	90	43319
Problem 1. Times 2 - START HERE Created by: Cody Team Tags intro, math, easy	142	58801
Problem 49. Sums with Excluded Digits Created by: Cody Team Tags strings	9	1349
Problem 48. Making change Created by: Cody Team Tags money	12	2512
Problem 47. Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	1290
Problem 46. Which doors are open? Created by: Cody Team Tags matlab, iteration	18	2472
Problem 45. Make a Palindrome Number Created by: Cody Team Tags strings	11	1562
Problem 44. Trimming Spaces Created by: Cody Team Tags strings, whitespace	6	1525
Problem 43. Subset Sum Created by: Cody Team Tags matlab	14	1071
Problem 42. Find the alphabetic word product Created by: Cody Team Tags matlab	6	2589
Problem 41. Cell joiner Created by: Cody Team Tags strings, matlab	12	2988
Problem 40. Reverse Run-Length Encoder Created by: Cody Team Tags encoding	8	1786
Problem 39. Which values occur exactly three times? Created by: Cody Team Tags search	13	4275
Problem 38. Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	7	1609
Problem 37. Pascal's Triangle Created by: Cody Team Tags math, combinatorics	14	3267
Problem 36. Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	910
Problem 35. Quote Doubler Created by: Cody Team Tags regexp, strings, quotes	6	1903
Problem 34. Binary numbers Created by: Cody Team Tags matlab	21	2596
Problem 33. Create times-tables Created by: Cody Team Tags matrices	43	10458
Problem 32. Most nonzero elements in row Created by: Cody Team Tags matrices	27	6584
Problem 31. Remove all the words that end with "ain" Created by: Cody Team Tags matlab 101, regexp, strings	14	1372
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	4767
Problem 29. Nearest Numbers Created by: Cody Team Tags vectors, distance	27	3660
Problem 28. Counting Money Created by: Cody Team Tags regexp, strings	8	2611
Problem 27. Pangrams! Created by: Cody Team Tags strings	22	2696
Problem 26. Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	90	23290

Recent Group Finishers220

Recent Activity

	ndb submitted Solution 2671907 to Problem 4. Make a checkerboard matrix 1 hour and 10 minutes ago
	ndb submitted Solution 2671871 to Problem 4. Make a checkerboard matrix 1 hour and 17 minutes ago
	Apoorv Singh submitted Solution 2670872 to Problem 4. Make a checkerboard matrix 6 hours and 40 minutes ago
	Apoorv Singh submitted Solution 2670863 to Problem 32. Most nonzero elements in row 6 hours and 44 minutes ago
	Apoorv Singh submitted Solution 2670851 to Problem 29. Nearest Numbers 6 hours and 48 minutes ago