Submitted
Relimiter for text files
A utility for robustly changing the delimiter within text files in order to make them easier to use
11 years ago | 210 downloads |
Submitted
Zero-Order Hold
A fast, basic implementation of a ZOH designed to run on vectors/matrices
12 years ago | 1682 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
12 years ago | 17257 downloads |
Submitted
Predictive model calibration
A script exploring 3 useful concepts in predictive models
12 years ago | 743 downloads |
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...
13 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),....
13 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] ...
13 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.
13 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...
13 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...
13 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...
13 years ago
Solved
Alternating sum
Given vector x, calculate the alternating sum y = x(1) - x(2) + x(3) - x(4) + ...
13 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...
13 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 ...
13 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.
13 years ago | 795 downloads |
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...
13 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...
13 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 ...
13 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: ...
13 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...
13 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: ...
13 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 ...
13 years ago
Solved
Tricky timing
Write a function that takes between 0.5 seconds and 0.6 seconds to run.
13 years ago
Solved
Volume of this donut
Given hole diameter a, and outermost diameter b, determine the volume y of the resulting donut.
13 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. ...
13 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...
13 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:...
13 years ago