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	2161
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	51	12365
Problem 71. Read a column of numbers and interpolate missing data Created by: Cody Team Tags data cleaning, average	14	1362
Problem 70. Alphabetize by last name Created by: Cody Team Tags regexp, sorting	9	1184
Problem 69. Find the peak 3n+1 sequence value Created by: Cody Team Tags 3n+1	9	1164
Problem 68. Kaprekar Steps Created by: Cody Team Tags matlab, lookup table, poor_problem_statement	15	1176
Problem 67. Find common elements in matrix rows Created by: Cody Team Tags matlab	9	1177
Problem 66. Find the two-word state names Created by: Cody Team Tags regexp, states	2	800
Problem 65. Word Counting and Indexing Created by: Cody Team Tags strings, poor_test_suite	4	649
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	12	1368
Problem 63. Encode Roman Numerals Created by: Cody Team Tags encoding, lookup table	1	801
Problem 62. Elapsed Time Created by: Cody Team Tags time	11	1864
Problem 61. Find state names that end with the letter A Created by: Cody Team Tags regexp, states	6	738
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	47	4718
Problem 59. Pattern matching Created by: Cody Team Tags indexing	8	1948
Problem 58. Tic Tac Toe FTW Created by: Cody Team Tags game, fun, tic tac toe	14	912
Problem 57. Summing Digits within Text Created by: Cody Team Tags strings	7	1401
Problem 56. Scrabble Scores Created by: Cody Team Tags strings, scrabble	6	1099
Problem 55. Counting Sequence Created by: Cody Team Tags encoding	9	961
Problem 54. Maximum running product for a string of numbers Created by: Cody Team Tags sequences, matlab, poor_test_suite	4	1255
Problem 53. Duplicates Created by: Cody Team Tags strings, sets, matlab	3	1175
Problem 52. What is the next step in Conway's Life? Created by: Cody Team Tags life, automata	20	747
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	1366
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	523
Problem 94. Target sorting Created by: Cody Team Tags sorting, matlab	21	3708
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	602
Problem 91. Get the area codes from a list of phone numbers Created by: Cody Team Tags regexp	1	542
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	670
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	751
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	562
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	1003
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	847
Problem 76. De-dupe Created by: Cody Team Tags matlab	7	1902
Problem 75. Find the palindrome Created by: Cody Team Tags strings	4	724
Problem 74. Balanced number Created by: Cody Team Tags matlab	14	2198
Problem 73. Replace NaNs with the number that appears to its left in the row. Created by: Cody Team Tags matlab	11	2225
Problem 25. Remove any row in which a NaN appears Created by: Cody Team Tags matlab 101, siam	54	7623
Problem 24. Function Iterator Created by: Cody Team Tags anonymous functions, function handles, nested functions	43	1277
Problem 23. Finding Perfect Squares Created by: Cody Team Tags sets, poor_test_suite	56	10097
Problem 22. Remove the vowels Created by: Cody Team Tags regexp, siam	15	5046
Problem 21. Return the 3n+1 sequence for n Created by: Cody Team Tags 3n+1, sample	53	7043
Problem 20. Summing digits Created by: Cody Team Tags strings	22	6130
Problem 19. Swap the first and last columns Created by: Cody Team Tags math, matlab 101, permutations	42	12819
Problem 18. Bullseye Matrix Created by: Cody Team Tags matrices	68	4791
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	40	15590
Problem 16. Return the largest number that is adjacent to a zero Created by: Cody Team Tags vectors	17	4100
Problem 15. Find the longest sequence of 1's in a binary sequence. Created by: Cody Team Tags regexp, diff, strings	35	3371
Problem 14. Find the numeric mean of the prime numbers in a matrix. Created by: Cody Team Tags easy, matrices	28	7395
Problem 13. Remove all the consonants Created by: Cody Team Tags regexp, basics	11	3292
Problem 12. Fibonacci sequence Created by: Cody Team Tags sequences, fibonacci, siam	58	11620
Problem 10. Determine whether a vector is monotonically increasing Created by: Cody Team Tags vectors, matlab 101	51	12365
Problem 9. Who Has the Most Change? Created by: Cody Team Tags indexing, notice the rignt sequence of money!, poor description	50	7765
Problem 8. Add two numbers Created by: Cody Team Tags matlab 101, basic matlab, basics	71	30335
Problem 6. Select every other element of a vector Created by: Cody Team Tags vectors, matlab 101, indexing	76	21376
Problem 5. Triangle Numbers Created by: Cody Team Tags math, triangle, nice	65	19113
Problem 4. Make a checkerboard matrix Created by: Cody Team Tags matrices, square	146	15126
Problem 3. Find the sum of all the numbers of the input vector Created by: Cody Team Tags matlab 101, easy, vector	70	34002
Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10] Created by: Cody Team Tags basic, basics, colon	91	43380
Problem 1. Times 2 - START HERE Created by: Cody Team Tags intro, math, easy	144	59023
Problem 49. Sums with Excluded Digits Created by: Cody Team Tags strings	9	1351
Problem 48. Making change Created by: Cody Team Tags money	12	2515
Problem 47. Extract leading non-zero digit Created by: Cody Team Tags math, maths, mathematics	1	1292
Problem 46. Which doors are open? Created by: Cody Team Tags matlab, iteration	18	2477
Problem 45. Make a Palindrome Number Created by: Cody Team Tags strings	11	1567
Problem 44. Trimming Spaces Created by: Cody Team Tags strings, whitespace	6	1527
Problem 43. Subset Sum Created by: Cody Team Tags matlab	14	1073
Problem 42. Find the alphabetic word product Created by: Cody Team Tags matlab	6	2595
Problem 41. Cell joiner Created by: Cody Team Tags strings, matlab	12	3001
Problem 40. Reverse Run-Length Encoder Created by: Cody Team Tags encoding	8	1790
Problem 39. Which values occur exactly three times? Created by: Cody Team Tags search	13	4284
Problem 38. Return a list sorted by number of occurrences Created by: Cody Team Tags vectors, sorting	7	1611
Problem 37. Pascal's Triangle Created by: Cody Team Tags math, combinatorics	14	3270
Problem 36. Find relatively common elements in matrix rows Created by: Cody Team Tags matlab	4	912
Problem 35. Quote Doubler Created by: Cody Team Tags regexp, strings, quotes	6	1908
Problem 34. Binary numbers Created by: Cody Team Tags matlab	21	2599
Problem 33. Create times-tables Created by: Cody Team Tags matrices	43	10476
Problem 32. Most nonzero elements in row Created by: Cody Team Tags matrices	27	6593
Problem 31. Remove all the words that end with "ain" Created by: Cody Team Tags matlab 101, regexp, strings	14	1375
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	4772
Problem 29. Nearest Numbers Created by: Cody Team Tags vectors, distance	27	3666
Problem 28. Counting Money Created by: Cody Team Tags regexp, strings	8	2616
Problem 27. Pangrams! Created by: Cody Team Tags strings	22	2701
Problem 26. Determine if input is odd Created by: Cody Team Tags easy, basic matlab, why matlab	90	23309

Recent Group Finishers222

Recent Activity

	Jeong Suong Yang submitted Solution 2695775 to Problem 26. Determine if input is odd 7 minutes ago
	Jeong Suong Yang submitted Solution 2695766 to Problem 27. Pangrams! 9 minutes ago
	Jeong Suong Yang submitted Solution 2695739 to Problem 28. Counting Money 25 minutes ago
	Jeong Suong Yang submitted Solution 2695733 to Problem 29. Nearest Numbers 42 minutes ago
	Jeong Suong Yang submitted Solution 2695691 to Problem 30. Sort a list of complex numbers based on far they are from the origin. 1 hour and 11 minutes ago