Solved

Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

11 years ago

Solved

Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

11 years ago

Solved

Fix y_correct : Hack
The Test Suite has an error. Fix the y_correct value. (See the tags for hints)

11 years ago

Solved

Sophie Germain prime
In number theory, a prime number p is a *Sophie Germain prime* if 2p + 1 is also prime. For example, 23 is a Sophie Germain prim...

11 years ago

Solved

Number of Horns on a unicorn!
Calculate the number of horns on a *unicorn*! And I'm talking about a unicorn with not more than one horn on it!

11 years ago

Solved

Vectorize the digits of an Integer
Create a vector of length N for an integer of N digits. x=123045; x_vec=[1 2 3 0 4 5]; I happened upon a trick to do ...

12 years ago

Solved

Hack not this Test Suite you will
Another Hack 10000 Challenge. I am thinking of an integer between 1 and 10000. Return a value between 1 and 10000. I ma...

12 years ago

Solved

middleAsColumn: Return all but first and last element as a column vector
Given input A, return all but the first and last elements, arranged as a column vector. (I.e., all dimensions after the first s...

12 years ago

Solved

Whether the input is vector?
Given the input x, return 1 if x is vector or else 0.

12 years ago

Solved

More luck than brains
Give a random function that guess and return numbers from 1 to 6 exactly like the test suite .

12 years ago

Solved

edge detection
write a function that gives the indexes of rising or falling edge x is a vector (assume it contains always at least one eleme...

12 years ago

Solved

Rotate a Matrix
Input a Matrix x, Output y is the matrix rotating x 90 degrees clockwise

12 years ago

Solved

Is A the inverse of B?
Given a matrix A and a matrix B, is A the inverse of B? >>A=[2,4;3,5]; >>B=[-2.5,2;1.5,-1]; >>isInverse...

12 years ago

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>...

12 years ago

Solved

Reindex a vector
You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX has integers. Place th...

12 years ago

Solved

Getting the absolute index from a matrix
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to get the <http://www.ma...

12 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...

12 years ago

Solved

Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

12 years ago

Solved

Set defaults
Write a function that computes the volume of a cube. The function should be able to accept three inputs: the length, width, and...

12 years ago

Solved

Sum of first n terms of a harmonic progression
Given inputs a, d and n, return the sum of the first n terms of the harmonic progression a, a/(1+d), a/(1+2d), a/(1+3d),....

12 years ago

Solved

Number of 1s in a binary string
Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

12 years ago

Solved

Flip the main diagonal of a matrix
Given a n x n matrix, M, flip its main diagonal. Example: >> M=magic(5); >> flipDiagonal(M) 9 24 1 ...

12 years ago

Solved

Cody Computer Part 2 - Get the license number of Cody Computer
In the Cody computer investigation party, you may have already solved : <http://www.mathworks.com/matlabcentral/cody/problems...

12 years ago

Solved

Find the largest value in the 3D matrix
Given a 3D matrix, A, find the largest value. E.g. >> A = 1:9; >> A=reshape(A,[3 1 3]); >> islargest(A) ans = 9

12 years ago

Solved

Cody Computer Part 1 - Guess the system font used by uipanel
list = listfonts return the list of available system fonts. Can you guess which font is used for uipanel on the CODY computer...

12 years ago

Solved

Count photos
Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total nu...

12 years ago

Solved

Make an awesome ramp for a tiny motorcycle stuntman
Okay, given a vector, say v=[1 3 6 9 11], turn it into a matrix 'ramp' like so: m=[1 3 6 9 11; 3 6 9 11 0; 6 9 ...

12 years ago

Solved

Find the Kronecker Tensor Product without using KRON
The Kronecker Tensor Product is the result of multiplying all elements of a matrix with each of the elements of another matrix. ...

12 years ago

Solved

What is the distance from point P(x,y) to the line Ax + By + C = 0?
Given a point, P(x,y), find the distance from this point to a linear line. INPUTS: x, y, A, B, C OUTPUTS: d, the distance ...

12 years ago

Solved

Replace May with April
For instance, if the input is input_str = 'The flowers may bloom in April'; then the output is output_str = 'The flo...

12 years ago