Heyi Ding

Last seen: mer än ett år ago | Active since 2022

Followers: 0 Following: 0

Statistics

Feeds

Solved

Matrix with different incremental runs
Given a vector of positive integers a = [ 3 2 4 ]; create the matrix where the *i* th column contains the vector *1:a(i)...

mer än ett år ago

Solved

Set some matrix elements to zero
First get the maximum of each *row*, and afterwards set all the other elements to zero. For example, this matrix: 1 2 3 ...

mer än ett år ago

Solved

Remove the air bubbles
Given a matrix a, return a matrix b in which all the zeros have "bubbled" to the top. That is, any zeros in a given column shoul...

mer än ett år ago

Solved

surrounded matrix
With a given matrix A (size m x n) create a matrix B (size m+2 x n+2) so that the matrix A is surrounded by ones: A = [1 2 ...

mer än ett år 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...

mer än ett år ago

Solved

Sum of first n positive integers
Given n, find the sum of first n positive integers Example: If n=10, then x=1,2,3,4,5,6,7,8,9,10. The sum of these terms is 55

mer än ett år ago

Solved

Determine the length of a string of characters
Determine the length of a string of characters

mer än ett år ago

Solved

Equal to their cube
Tell me three real numbers that are equal to their cubes?

mer än ett år ago

Solved

Matlab Basics II - Extract last 3 elements of a vector
Let x be a vector of unknown length, we are always interested in the last 3 numbers in the vector, write a function that gives t...

mer än ett år ago

Solved

Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).

mer än ett år ago

Solved

Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

mer än ett år ago

Solved

Sum of series VI
What is the sum of the following sequence: Σk⋅k! for k=1...n for different n?

mer än ett år ago

Solved

Square Diagonal
If n is the given number, then make a diagonal matrix of size 2*2 with the square of that number.

mer än ett år ago

Solved

Y=X
Given an input variable x, output a variable y that is equal in value to x. Example: Input x = 1 Output y is 1 Inp...

mer än ett år ago

Solved

Weighted average
Given two lists of numbers, determine the weighted average as follows Example [1 2 3] and [10 15 20] should result in 33.3...

mer än ett år ago

Solved

Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

mer än ett år ago

Solved

Calculate Inner Product
Given two input matrices, |x| and |y|, check if their inner dimensions match. * If they match, create an output variable |z|...

mer än ett år ago

Solved

reverse string
input='rama' output='amar'

nästan 2 år ago

Solved

find the maximum element of the matrix
for e.g x = [1 2; 3 4] y = 4

nästan 2 år ago

Solved

Convert binary numbers array into array of decimal numbers.
Convert binary numbers array into array of decimal numbers. Example x=[ 11001000 ; 11001001 ; 11001010 ; 11001011 ; 11001100 ;...

nästan 2 år ago

Solved

Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

nästan 2 år ago

Solved

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

nästan 2 år ago

Solved

Bit Reversal
Given an unsigned integer _x_, convert it to binary with _n_ bits, reverse the order of the bits, and convert it back to an inte...

ungefär 2 år ago

Solved

Matlab Basics II - Count rows in a matrix
Write a function that returns that number of rows in a vector or matrix x example: x = [1; 2; 3] output = 3

ungefär 2 år ago

Solved

Return 'on' or 'off'
When the input is true, return 'on', otherwise, return 'off'.

ungefär 2 år ago

Solved

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

ungefär 2 år ago

Solved

Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

ungefär 2 år ago

Solved

Unit Matrix
Given n, you should return an n-by-n unit matrix. Example: If input is n=2 then A = [ 1 0 0 1 ] If input ...

ungefär 2 år ago

Solved

Is the input divisible by 3?
Return true if the input is divisible by 3 and false if not.

ungefär 2 år ago

Solved

Square a Number
Given an input x, return y, which is equal to the square of x.

ungefär 2 år ago

Heyi Ding

Statistics

Introduction to MATLAB Master

Cody

Community Group Solver

Cody

Solver

Cody

Feeds