Solved

Replace Vector Elements
Replace all elements in a vector which are equal to or smaller than zero with 0.1. Example: A = [1 2 3 -1 0 2 -3 -80]; ...

13 years ago

Solved

Use of regexp
* Given a string, containing several sentences, such as: * 'I played piano. John played football. Anita went home. Are you safe...

13 years ago

Solved

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

13 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. ...

13 years ago

Solved

cos for boss?
a programmer had too much coffee and his boss needs cos(alpha+beta) correctly, especially when alpha or beta or the coffee are c...

13 years ago

Solved

Dancing with wolves?
let wolf() make one or two steps to get a feel of the beat, it is waltz, do not let wolf() make the third step, return safely ju...

13 years ago

Solved

Numbers with prime factors 2, 3 and 5.
Make a function which takes one positive integer n and returns a matrix with the numbers of the form (2^i)*(3^j)*(5^k) which are...

13 years ago

Solved

Return elements unique to either input
Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For ex...

13 years ago

Solved

Vectorizing, too easy or too hard?
Please insert a . before any ^, * or / in the string. That's it!!

13 years ago

Solved

Number of bytes required to store a sparse matrix
The input is always a *sparse* matrix : x = sparse(100,1000,0.01); >>whos x shows that 4016 bytes ares required . ...

13 years ago

Solved

Remove the two elements next to NaN value
The aim is to *remove the two elements next to NaN values* inside a vector. For example: x = [6 10 5 8 9 NaN 23 9 7 3 21 ...

13 years ago

Solved

Alias abs to asb
Create an alias of a built-in function name. Goal is to alias asb with abs for dyslexic typers. The test suite will be ...

13 years 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...

13 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 ...

13 years ago

Solved

Project Euler: Problem 8, Find largest product in a large string of numbers
Find the greatest product of five consecutive digits in an n-digit number. 73167176531330624919225119674426574742355349194934...

13 years ago

Solved

Mandelbrot Numbers
The <http://en.wikipedia.org/wiki/Mandelbrot_set Mandelbrot Set> is built around a simple iterative equation. z(1) = c z...

13 years ago

Solved

Create a function handle that reverses the input arguments of another function handle
Given a function that takes two input arguments and returns one output, create another function handle that performs the same op...

13 years ago

Solved

Project Euler: Problem 5, Smallest multiple
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smalle...

14 years ago

Solved

Remove the polynomials that have positive real elements of their roots.
The characteristic equation for a dynamic system is a polynomial whose roots indicate its behavior. If any of the <http://www.ma...

14 years ago

Solved

root?
* Given a function 'foo', and a position 'there', find the root near 'there'. * For example: If foo=@sin, and there=3.1, then r...

14 years ago

Solved

It dseon't mettar waht oedrr the lrettes in a wrod are.
An internet meme from 2003 (read more <http://www.snopes.com/language/apocryph/cambridge.asp here>) asserted that readers are re...

14 years ago

Solved

Read a column of numbers and interpolate missing data
Given an input cell array of strings s, pick out the second column and turn it into a row vector of data. Missing data will be i...

14 years ago

Solved

Differential equations I
Given a function handle |f| an initial condition |y0| and a final time |tf|, solve numerically the differential equation dy...

14 years ago

Solved

Create One Large Eye of size N x N Quickly?
*<http://en.wikipedia.org/wiki/Aye_(yes) Aye !!!>*

14 years ago

Solved

Create a dictionary
The goal is to write a function that returns a dictionary from a list of words or phrases and their definitions. Here is an exam...

14 years 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)).

14 years ago

Solved

Return unique values without sorting
If the input vector A is [42 1 1], the output value B must be the unique values [42 1] The *values of B are in the s...

14 years ago

Solved

Leaking?
Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of its molecular weight. A b...

14 years ago

Solved

Angle of triangle
For three unknown points a b c, given three sides ab bc ca, find three angles abc bca cab in radians. Your function should b...

14 years ago

Solved

collision
several cars (n) were involved in this collision, the input matrix (vm) has n rows and two columns, first column for velocity an...

14 years ago