Solved

Back to basics 1 - Saving

Covering some basic topics I haven't seen elsewhere on Cody. Given an input variable 'x', save it to disk in a file named 'co...

7 years ago

Solved

Get the length of a given vector

Given a vector x, the output y should equal the length of x.

7 years ago

Solved

Check if number exists in vector

Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

7 years ago

Solved

Bottles of beer

Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

7 years ago

Solved

Back to basics 8 - Matrix Diagonals

Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector of numbers, output a square array with the...

7 years ago

Solved

How to find the position of an element in a vector without using the find function

Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

7 years ago

Solved

Transpose

Write a MATLAB script in order to convert a random length row vector (v) into a column vector.

7 years ago

Solved

Find the alphabetic word product

If the input string s is a word like 'hello', then the output word product p is a number based on the correspondence a=1, b=2, ....

7 years ago

Solved

Most nonzero elements in row

Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

7 years ago

Solved

Make a 1 hot vector

Make a vector of length _N_ that consists of all zeros except at index _k_, where it has the value 1. Example: Input ...

7 years ago

Solved

Test if two numbers have the same digits

Given two integers _x1_ and _x2_, return |true| if the numbers written with no leading zeros contain the same digits. That is, t...

7 years ago

Solved

Solve the Sudoku Row

*Description* A simple yet tedious task occurs near the end of most Sudoku-solving algorithms, computerized or manual. The ta...

7 years ago

Solved

Return the first and last character of a string

Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

7 years ago

Solved

Which values occur exactly three times?

Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

7 years ago

Question

How to remove duplicates in an array

Ex: In the array x=[1 2 2 3 3 3 4 5], i want to eliminate all repeating elements (2,3) and retain non-repeating elements (1,4,...

7 years ago | 3 answers | 0

Question

How to split letters in a word into an array

Ex: In the word *'HELLO'*, extract the letters *'H' 'E' 'L' 'L' 'O'*

7 years ago | 3 answers | 0

Solved

Convert a vector into a number

This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

7 years ago

Solved

Find the sum of the elements in the "second" diagonal

Find the sum of the elements in the diagonal that starts at the top-right corner and ends at the bottom-left corner.

7 years ago

Solved

Sorted highest to lowest?

Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1

7 years ago

Solved

Increment a number, given its digits

Take as input an array of digits (e.g. x = [1 2 3]) and output an array of digits that is that number "incremented" properly, (i...

7 years ago

Solved

Return the largest number that is adjacent to a zero

This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

7 years ago

Solved

Compute a dot product of two vectors x and y

x and y are input vectors, d is a number and contains their dot product

7 years ago

Solved

radius of a spherical planet

you just measured its surface area, that is the input.

7 years ago

Solved

Finding Perfect Squares

Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

7 years ago

Solved

First N Perfect Squares

*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];

7 years ago

Solved

Back to basics 22 - Rotate a matrix

Covering some basic topics I haven't seen elsewhere on Cody. Rotate the input matrix 90 degrees counterclockwise (e.g. [1 2; ...

7 years ago

Solved

Determine Whether an array is empty

Input a matrix x, output y is TRUE if x is empty, otherwise FALSE.

7 years ago

Solved

Back to basics 21 - Matrix replicating

Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, generate an output matrix that consists o...

7 years ago