chen

Attivo dal 2013

Followers: 0 Following: 0

Messaggio

Statistica

All

RANK
3.210
of 160.124

CONTRIBUTI
0 Problemi
109 Soluzioni

PUNTEGGIO
1.090

NUMERO DI BADGE
1

Visualizza badge

Feeds

Domanda

How to vectorize this "for" loop, or parallel it.
fun = @(x,y) x + x.*y; N = 1e3; K = zeros(N); for i = 1:N for j = i:N K(i,j) = fun(i, j); end end

circa 11 anni fa | 2 risposte | 0

2

risposte

Risolto

Number of 1s in the Binary Representation of a Number
*Description* Return the number of 1s in the (unsigned integer) binary representation of a number. This function should be ab...

oltre 11 anni fa

Risolto

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>...

oltre 11 anni fa

Risolto

Duplicate each element of a vector.
for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...

oltre 11 anni fa

Risolto

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...

oltre 11 anni fa

Risolto

Back to basics 10 - Max Float
Covering some basic topics I haven't seen elsewhere on Cody. Return the largest positive floating-point number MATLAB can han...

oltre 11 anni fa

Risolto

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

oltre 11 anni fa

Risolto

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....

oltre 11 anni fa

Risolto

All your base are belong to us
Find the base _b_ logarithm of the input decimal number _x_. Express the output as a decimal number. The first argument is the n...

quasi 12 anni fa

Risolto

Project Euler: Problem 6, Natural numbers, squares and sums.
The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ...

quasi 12 anni fa

Risolto

Remove NaN ?
input -> matrix (n*m) with at least one element equal to NaN; output -> matrix(p*m), the same matrix where we deleted the enti...

quasi 12 anni fa

Risolto

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...

quasi 12 anni fa

Risolto

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; ...

quasi 12 anni fa

Risolto

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

quasi 12 anni fa

Risolto

Maximum running product for a string of numbers
Given a string s representing a list of numbers, find the five consecutive numbers that multiply to form the largest number. Spe...

quasi 12 anni fa

Risolto

The Goldbach Conjecture, Part 2
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

quasi 12 anni fa

Risolto

Love triangles
Given a vector of lengths [a b c], determines whether a triangle with non-zero area (in two-dimensional Euclidean space, smarty!...

quasi 12 anni fa

Risolto

Duplicates
Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

quasi 12 anni fa

Risolto

Back to basics 11 - Max Integer
Covering some basic topics I haven't seen elsewhere on Cody. Return the largest positive integer MATLAB can handle.

quasi 12 anni fa

Risolto

Find the two most distant points
Given a collection of points, return the indices of the rows that contain the two points most distant from one another. The inpu...

quasi 12 anni fa

Risolto

Function Iterator
Given a handle fh to a function which takes a scalar input and returns a scalar output and an integer n >= 1, return a handle f...

quasi 12 anni fa

Risolto

Indexed Probability Table
This question was inspired by a Stack Overflow question forwarded to me by Matt Simoneau. Given a vector x, make an indexed pro...

quasi 12 anni fa

Domanda

Convert the variables x1, x2,... in an anonymous function to x(1,:) ,x(2,:).....
For example: f = @(x1, x2, ... , x15) x1 .* x2 .* ... .* x15 I want get: f = @(x) x(1,:) .* x(2,:) .* ... .*x(15,:)

circa 12 anni fa | 2 risposte | 0

2

risposte

Risolto

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...

circa 12 anni fa

Risolto

Sum of diagonal of a square matrix
If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

circa 12 anni fa

Risolto

Right and wrong
Given a vector of lengths [a b c], determines whether a triangle with those sides lengths is a right triangle: <http://en.wikipe...

circa 12 anni fa

Risolto

Omit columns averages from a matrix
Omit columns averages from a matrix. For example: A = 16 2 3 13 5 11 10 8 9 7 ...

circa 12 anni fa

Risolto

given 3 sides, find area of this triangle
1:3 -> 0; 3:5 -> 6

circa 12 anni fa

Risolto

Back to basics 6 - Column Vector
Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector, output true or false whether it is a colu...

circa 12 anni fa

Risolto

Extract leading non-zero digit
<http://en.wikipedia.org/wiki/Benford%27s_law Benford's Law> states that the distribution of leading digits is not random. This...

circa 12 anni fa

Carica altro