Submitted

Relimiter for text files

A utility for robustly changing the delimiter within text files in order to make them easier to use

9 years ago | 1 download |

Submitted

Zero-Order Hold

A fast, basic implementation of a ZOH designed to run on vectors/matrices

10 years ago | 6 downloads |

Submitted

Download Daily Data from Google and Yahoo! Finance

Provides functions for getting data from both data sources as well as helper utility functions

10 years ago | 27 downloads |

Submitted

Predictive model calibration

A script exploring 3 useful concepts in predictive models

10 years ago | 1 download |

Solved

Generate a random matrix A of (1,-1)

Input n: is an positive integer which serves as the dimension of the matrix A; Output: A=(Aij),where each entry Aij is either...

10 years ago

Solved

Sum of first n terms of a harmonic progression

Given inputs a, d and n, return the sum of the first n terms of the harmonic progression a, a/(1+d), a/(1+2d), a/(1+3d),....

10 years ago

Solved

Detect a number and replace with two NaN's

Write code which replaces the number 1 with two NaNs. Example X = [ 1 2 NaN 4 1 3 7 NaN 1 4 NaN 2] ...

10 years ago

Solved

Magic is simple (for beginners)

Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

10 years ago

Solved

7 segment LED display

Given a whole number, output how many segments would be lit up to display it on a 7 segment LED display (http://en.wikipedia.org...

10 years ago

Solved

letter yes yes & letter no no

Split a string into two strings, first string has all alphabetic letters, next string has all the rest, keep the order please, o...

10 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...

10 years ago

Solved

Alternating sum

Given vector x, calculate the alternating sum y = x(1) - x(2) + x(3) - x(4) + ...

10 years ago

Solved

Woodall number

Test whether the input is a Woodall number: <http://en.wikipedia.org/wiki/Woodall_number> _Please do not cheat by simply chec...

10 years ago

Solved

Test if a Number is a Palindrome without using any String Operations

*Description* Given an integer _X_, determine if it is a palindrome number. That is, _X_ is equal to the _X_ with the digits ...

10 years ago

Submitted

Speeding Up Algorithms: When Parallel Computing and GPUs do and don't accelerate

Files and slides from the presentation of the same name.

10 years ago | 1 download |

Solved

Find the nearest integer

Given a vector of integers and a real number find the closest integer. EX: >> a = [2 4 5 6 8 10]; >> b = 4.6; >> nea...

10 years ago

Solved

Back to basics 24 - Symbolic variables

Covering some basic topics I haven't seen elsewhere on Cody. Given a string algebraic expression, return the symbolic variabl...

10 years ago

Solved

Who invented zero?

We know the importance zero in computer science, mathematics... but who invented zero? Clue: He was the first in the line ...

10 years ago

Solved

Find number of days

The input is two date in string format (dd-mm-yyyy) find out the number of days between these two dates. Example: input: ...

10 years ago

Solved

Sum the entries of each column of a matrix which satisfy a logical condition.

Given a numeric matrix A and a logical array L of the same size as A, return a row vector S containing the columnwise sums of th...

10 years ago

Solved

Fill a zeros matrix

The aim is to fill an array of all zeros given a numerical value and the index of row and columns for this value. 3 Inputs: ...

10 years ago

Solved

Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4

Example: in = magic(5) in = 17 24 1 8 15 23 5 7 14 16 4 6 13 20 ...

10 years ago

Solved

Tricky timing

Write a function that takes between 0.5 seconds and 0.6 seconds to run.

10 years ago

Solved

Volume of this donut

Given hole diameter a, and outermost diameter b, determine the volume y of the resulting donut.

10 years 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. ...

10 years ago

Solved

Parasitic numbers

Test whether the first input x is an n-parasitic number: <http://en.wikipedia.org/wiki/Parasitic_number>. ( _n_ is the second in...

10 years ago

Solved

Better bullseye matrix

<http://www.mathworks.com/matlabcentral/cody/problems/18-bullseye-matrix Problem 18> asks to create a bullseye matrix like this:...

10 years ago