Solved

Create a Multiplication table matrix...

Create a product table in this format: P = [ 1 2 3 4 5; 2 4 6 8 10; 3 6 9 12 15; 4 8 12 1...

environ 8 ans ago

Solved

newRMS

find root mean square of a signal x in less time than the test code and accurate to six places.

environ 8 ans ago

Solved

random picture with random colours

write a function which creates a random(x,y) matrix with random RGB colours for example create_pic(5,5) gives us a 3d matrix. ...

environ 8 ans ago

Solved

Function composition

Write a function that accepts two function handles f and g and returns the composition h. That is, h = (f o g)(x) = f(g(x)) ...

environ 8 ans ago

Solved

Rotate input square matrix 90 degrees CCW without rot90

Rotate input matrix (which will be square) 90 degrees counter-clockwise without using rot90,flipud,fliplr, or flipdim (or eval)....

environ 8 ans ago

Solved

remove nans fast

There are several ways to locate and remove nans in a matrix, and return an 1d row vector. In this problem the challenge is ...

environ 8 ans ago

Solved

Generate this matrix

Generate the following matrix. n = 2; out = [-4 -3 -2 -1 0 -3 -2 -1 0 1 -...

environ 8 ans ago

Solved

subsequences of the same numbers

Finding the largest consecutive subsequences of the same numbers (the return value is itself subsequence). For example: 1....

environ 8 ans ago

Solved

Split a given string from the first instance of a given character

A simple operation to split a given string into two substrings at the point where the desired character is first found. e.g. ...

environ 8 ans ago

Solved

Sum Rows

Sum the same indexed (unique) rows. Examine the test suite. Related Challenge - <http://www.mathworks.com/matlabcentral/cody/...

environ 8 ans ago

Solved

Remove NaNs and numbers adjacent to NaNs

The aim is to remove the elements before and after NaN occurrences inside a vector. For example: x = [6 10 5 8 9 NaN 23 1...

environ 8 ans ago

Solved

Calculate the area of a triangle between three points

Calculate the area of a triangle between three points: P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) these three points are the vert...

environ 8 ans ago

Solved

Given a matrix, return the last eigen value

Given a matrix, return the first eigen value For example: x = magic(5) 17 24 1 8 15 23 5 7 14 ...

environ 8 ans ago

Solved

Largest Twin Primes

<http://en.wikipedia.org/wiki/Twin_prime Twin primes> are primes p1, p2 = p1 + 2 such that both p1 and p2 are prime numbers. Giv...

environ 8 ans ago

Solved

Divisors of an integer

Given a number N, return a vector V of all integers that divide N. For example, N = 10 Then V=[1 2 5 10]

environ 8 ans ago

Solved

Convert from Base 10 to base 5

Convert the input number from base 10 into base 5: for example: if a(in base 10)= 5 then a(in base 5)= 10

environ 8 ans 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...

environ 8 ans ago

Solved

Volume and area of a sphere

Input(r) - radius Output([v,s]) - volume and area

environ 8 ans ago

Solved

N-Cards Problem

You have a deck of _N_ cards numbered in order from 1 to _N_. You discard the top card (card 1) and place the next card (card 2)...

environ 8 ans ago

Solved

DC chopper

Input x is the sampled signal vector, may have both AC and DC components. output vector y should have AC components removed then...

environ 8 ans 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 ...

environ 8 ans ago

Solved

High school cafeteria

Given an input vector of positive integers, return a row vector with the primes first (in increasing order) and the composites n...

environ 8 ans ago

Solved

The Tower of Hanoi

In the <http://en.wikipedia.org/wiki/Tower_of_Hanoi Tower of Hanoi problem> with 3 rods (1, 2 & 3), the goal is to move a tower ...

environ 8 ans ago

Solved

Return the 'Size' of a String of Code

One of the most 'mysterious' parts of playing Cody is the sizing system. Given a string of commands, return the size that Cody w...

environ 8 ans ago

Solved

Hackathon: the beginnings

I am thinking of a number between 1 and 10000... can you guess what this number is? *Description* The test suite has rando...

environ 8 ans ago

Solved

Multielement indexing of a row array

The row array birthRateChina stores the China birth rate (per 1000 people) for years 2000 to 2012. Write a statement that create...

environ 8 ans ago

Solved

Triangle Numbers Below N

This is an offshoot of <http://www.mathworks.com/matlabcentral/cody/problems/5-triangle-numbers Cody Problem 5: Triangle Numbers...

environ 8 ans ago

Solved

Number of Circles in a Number

Given a number, return the number of closed 'circles' in the base 10 numerical representation. Note: the number 4 has no circ...

environ 8 ans ago