已解决

Vector to 3-Column Matrix
Consider a vector *A* such as A = [1 2 3 3 4 5 6] Can you convert this vector to a three-column matrix like this: ...

8 years 前

已解决

Sort Reversal
There are n index cards in a row, with n distinct integers written on them (one number per card) so that the numbers are sorted ...

8 years 前

已解决

007: Chinese Barrack Invasion
*MISSION:* Successfully invade a military barrack located in China. *WARNING:* There is a row of _n_ security switches protec...

8 years 前

已解决

Five Fingers
A little girl has just learnt how to count from 1 to N using the five fingers of her left hand as follows. She starts by calling...

8 years 前

已解决

Seperate array to small section according to its index position
Given a integer n, we can generate a sequence [0,1,2,3,4,..., 2^n-1], then we separate it to two sequence according to their ind...

8 years 前

已解决

The Google Interview: Two Eggs Problem
Consider the following problem, a popular Google interview question: A firm has invented a super-strong egg. For publicity pu...

8 years 前

已解决

God of War: The Chains Of Olympus
The Spartan warrior, Kratos, is held by a chain of _n > 1_ links in the underworld. His only chance of survival is to break the ...

8 years 前

已解决

Counting Squares
An algorithm starts with a single square and on each of its next iterations adds new squares all around the outside as shown bel...

8 years 前

已解决

Penny Distribution Machine
A machine consists of a row of boxes. To start, one places N pennies in the leftmost box. The machine then redistributes the pen...

8 years 前

已解决

Replace secondary diagonal elements of a square array
Replace all the secondary diagonal elements of the square array A with the number n Example: A = [1 2 3 4 5 6 ...

8 years 前

已解决

Cumulative maximum of an array
Find the cumulative maximum of an array without using the built-in function <http://www.mathworks.com/help/matlab/ref/cummax.htm...

8 years 前

已解决

Block average ignoring NaN values
Given a matrix, calculate the block average of each disjoint sub-matrix while ignoring *NaN* values. Assume that the size of the...

8 years 前

已解决

Matrix multiplication across rows
Given matrix m, return matrix n such that, rows of n are result of multiplication of the rows of the input matrix Example ...

8 years 前

已解决

A matrix of extroverts
Now that the introverts have had their script, the extroverts spoke up (naturally!) and demanded one as well. You will be given...

8 years 前

已解决

Matrix of Multiplication Facts
This is James's daughter again, sneaking into his Cody account. Thanks to your help in my math class last year, I did great! B...

8 years 前

已解决

Replace Nonzero Numbers with 1
Given the matrix x, return the matrix y with non zero elements replaced with 1. Example: Input x = [ 1 2 0 0 0 ...

8 years 前

已解决

Are you in or are you out?
Given vertices specified by the vectors xv and yv, and a single point specified by the numbers X and Y, return "true" if the poi...

8 years 前

已解决

Volume of a Parallelepiped
Calculate the volume of a Parallelepiped given the vectors for three edges that meet at one vertex. A cube is a special case ...

8 years 前

已解决

Clock Hand Angle 1
Given a time in HH:MM:SS, find the smallest angle (in degrees) between the hour and minute hand

8 years 前

已解决

Covering area
As an extension of the problem <http://www.mathworks.com/matlabcentral/cody/problems/416-polygon-area>, find the area, bounded b...

8 years 前

已解决

Find the stride of the longest skip sequence
We define a _skip sequence_ as a regularly-spaced list of integers such as might be generated by MATLAB's <http://www.mathworks....

8 years 前

已解决

Golomb's self-describing sequence (based on Euler 341)
The Golomb's self-describing sequence {G(n)} is the only nondecreasing sequence of natural numbers such that n appears exactly G...

8 years 前

已解决

Spherical radius given four points
Determine the radius of a sphere provided four non-coplanar points on the surface of the sphere. pts = [x1 y1 z1; x...

8 years 前

已解决

Is X a Fibonacci Matrix?
In honor of Cleve's new blog and post: <http://blogs.mathworks.com/cleve/2012/06/03/fibonacci-matrices/> Is X a Fibonacci ...

8 years 前

已解决

Nodal Voltage of Resistor Ladder Network
* You have a bunch (an even number N) of identical resistors (each R ohms), a good battery (V volts) and a high impedance voltme...

8 years 前

已解决

Getting logical indexes
This is a basic MATLAB operation. It is for instructional purposes. --- Logical indexing works like this. thresh = 4...

8 years 前

已解决

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...

8 years 前

已解决

"Low : High - Low : High - Turn around " -- Create a subindices vector
Let two vectors *lo* and *hi* be given. The job is to create a index vector like so idx = [lo(1):hi(1) lo(2):hi(2) ...]...

8 years 前

已解决

create a square matrix
create a [n*n] matrix. example: mat(4)= [ 1 4 9 16 4 4 9 16 9 9 ...

8 years 前

已解决

Create a square matrix with given conditions
Create a square matrix, M, which should be populated as follows: M = [ n^2 n * (n-1) n * (n-2) ... n * 2 n * ...

8 years 前