Solved

Volume of a Simplex
Return the volume of a <http://en.wikipedia.org/wiki/Simplex regular _n_-simplex> with a unit side length. Results are up to...

13 years ago

Problem

Volume of a Simplex
Return the volume of a <http://en.wikipedia.org/wiki/Simplex regular _n_-simplex> with a unit side length. Results are up to...

13 years ago | 1 | 98 solvers

Solved

Sophie Germain prime
In number theory, a prime number p is a *Sophie Germain prime* if 2p + 1 is also prime. For example, 23 is a Sophie Germain prim...

13 years ago

Solved

Return 'on' or 'off'
When the input is true, return 'on', otherwise, return 'off'.

13 years ago

Problem

Convolution Power
Create the convolution-power vector from initial vector _x_ and power _n_. In other words, similar to the scalar case, raising ...

13 years ago | 2 | 54 solvers

Solved

Convolution Power
Create the convolution-power vector from initial vector _x_ and power _n_. In other words, similar to the scalar case, raising ...

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

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

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

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

Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples : n=2, A=[1 2 3] -> [1 1 2 2 3 3] n=0...

13 years ago

Solved

Kaprekar numbers
Test if the input is a Kaprekar number: <http://mathworld.wolfram.com/KaprekarNumber.html>. Return a logical true or false. ...

13 years ago

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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

Return the Fibonacci Sequence
Write a code which returns the Fibonacci Sequence such that the largest value in the sequence is less than the input integer N. ...

13 years ago

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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...

13 years ago

Solved

Solve the set of simultaneous linear equations
Given this pair of simultaneous linear equations: 2x + 3y = 23 3x + 4y = 32 Find the solution set (x,y)

13 years ago

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Reverse the elements of an array
Reverse the order of elements in an array: eg: input X = [ 1 2 3 ; 4 5 6 ; 7 8 9 ] o...

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

Insert zeros into vector
Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

13 years ago

Solved

peta to nano (x-ray)
for certain x-ray radiation, given frequency in petahertz, give wavelength in nanometer, must be accurate +/- 25%

13 years ago

Solved

Output any real number that is neither positive nor negative
Output any real number that is neither positive nor negative

13 years ago

Solved

Count up then down
Create a function that produces counting up from 0 up to n then down to 0 n=2 --> 0 1 2 1 0 n=3 --> ...

13 years ago

Solved

Steal, Share, or Catch
You, I, and a few other characters are going to play a game of *Steal, Share or Catch*. We are going to play it 10,000 times vs...

13 years ago

Solved

Back to basics 18 - justification
Covering some basic topics I haven't seen elsewhere on Cody. Given a string with extra spaces in front and/or in back, return...

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

Solved

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

13 years ago

Solved

Remove white space from the string
Remove the white spaces (trailing and leading) from the input variable

13 years ago

Solved

Create a vector whose elements depend on the previous element
The idea is to create a vector A whose elements depend on the previous element : *A(i+1) = 2*A(i)+1* *2 Inputs*: - A : The...

13 years ago

Solved

Generate N equally spaced intervals between -L and L
Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

13 years ago

Solved

Replace multiples of 5 with NaN
It is required to replace all values in a vector that are multiples of 5 with NaN. Example: input: x = [1 2 5 12 10 7] ...

13 years ago