Problems

1 – 50 of 76

Problem Title Likes Solvers Difficulty

Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

110

22111

Problem 26. Determine if input is odd

Created by: Cody Team

Tags easy, basic matlab, why matlab

114

21171

Problem 6. Select every other element of a vector

Created by: Cody Team

Tags vectors, matlab 101, indexing

150

26136

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

14347

Problem 76. De-dupe

Created by: Cody Team

Tags matlab

2310

Problem 35. Quote Doubler

Created by: Cody Team

Tags regexp, strings, quotes

2279

Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

13056

Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

4349

Problem 19. Swap the first and last columns

Created by: Cody Team

Tags math, matlab 101, permutations

16029

Problem 14. Find the numeric mean of the prime numbers in a matrix.

Created by: Cody Team

Tags easy, matrices

7779

Problem 30. Sort a list of complex numbers based on far they are from the origin.

Created by: Cody Team

Tags sorting, basic matlab

4911

Problem 12. Fibonacci sequence

Created by: Cody Team

Tags sequences, fibonacci, siam

11551

Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

6655

Problem 32. Most nonzero elements in row

Created by: Cody Team

Tags matrices

6521

Problem 72. Interpolator

Created by: Cody Team

Tags interpolation

3023

Problem 21. Return the 3n+1 sequence for n

Created by: Cody Team

Tags 3n+1, sample

7128

Problem 9. Who Has the Most Change?

Created by: Cody Team

Tags indexing, notice the rignt sequence of money!, poor description

7834

Problem 10. Determine whether a vector is monotonically increasing

Created by: Cody Team

Tags vectors, matlab 101

110

15789

Problem 25. Remove any row in which a NaN appears

Created by: Cody Team

Tags matlab 101, siam

7676

Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

5395

Problem 4. Make a checkerboard matrix

Created by: Cody Team

Tags matrices, square

186

14240

Problem 62. Elapsed Time

Created by: Cody Team

Tags time

2251

Problem 40. Reverse Run-Length Encoder

Created by: Cody Team

Tags encoding

2013

Problem 66. Find the two-word state names

Created by: Cody Team

Tags regexp, states

980

Problem 39. Which values occur exactly three times?

Created by: Cody Team

Tags search

4419

Problem 73. Replace NaNs with the number that appears to its left in the row.

Created by: Cody Team

Tags matlab

2447

Problem 44. Trimming Spaces

Created by: Cody Team

Tags strings, whitespace

1839

Problem 42. Find the alphabetic word product

Created by: Cody Team

Tags matlab

2740

Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

1888

Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

2930

Problem 87. Indexed Probability Table

Created by: Cody Team

Tags matlab

1765

Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

1868

Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

3864

Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

1651

Problem 46. Which doors are open?

Created by: Cody Team

Tags matlab, iteration

2634

Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

4640

Problem 77. Clean the List of Names

Created by: Cody Team

Tags strings

1208

Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

135

13902

Problem 37. Pascal's Triangle

Created by: Cody Team

Tags math, combinatorics

3501

Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

3590

Problem 27. Pangrams!

Created by: Cody Team

Tags strings

3082

Problem 16. Return the largest number that is adjacent to a zero

Created by: Cody Team

Tags vectors

4481

Problem 53. Duplicates

Created by: Cody Team

Tags strings, sets, matlab

1671

Problem 74. Balanced number

Created by: Cody Team

Tags matlab

2369

Problem 85. Remove the polynomials that have positive real elements of their roots.

Created by: Cody Team

Tags matlab

1084

Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

1028

Problem 47. Extract leading non-zero digit

Created by: Cody Team

Tags math, maths, mathematics

1583

Problem 64. The Goldbach Conjecture, Part 2

Created by: Cody Team

Tags primes

1774

Problem 51. Find the two most distant points

Created by: Cody Team

Tags distance

2148

Problem 15. Find the longest sequence of 1's in a binary sequence.

Created by: Cody Team

Tags regexp, diff, strings

4667

1 – 50 of 76

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