Chad Gilbert
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Risolto
Circle area using pi
Given a circle's radius, compute the circle's area. Use the built-in mathematical constant pi.
quasi 12 anni fa
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Vectorizing, too easy or too hard?
Please insert a . before any ^, * or / in the string. That's it!!
circa 12 anni fa
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Who invented zero?
We know the importance zero in computer science, mathematics... but who invented zero? Clue: He was the first in the line ...
circa 12 anni fa
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Find Index of maximum Value and maximum Value of a vector
Find the Index of the first occurrence of the maximum value in a vector and also the maximum value in the vector. Example: [...
circa 12 anni fa
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Convert a numerical matrix into a cell array of strings
Given a numerical matrix, output a *cell array of string*. For example: if input = 1:3 output is {'1','2','3'} whic...
circa 12 anni fa
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Is it a number?
Determine if input is numeric. If it is,output is 1; if it is not, output is 0.
circa 12 anni fa
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Is it an Armstrong number?
An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. Fo...
circa 12 anni fa
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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.
circa 12 anni fa
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Alternating sum
Given vector x, calculate the alternating sum y = x(1) - x(2) + x(3) - x(4) + ...
circa 12 anni fa
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Is the Point in a Circle?
Check whether a point or multiple points is/are in a circle centered at point (x0, y0) with radius r. Points = [x, y]; c...
circa 12 anni fa
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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...
circa 12 anni fa
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does it touch ?
given a sentence, tell how much it touches. input : string output : how much it touches touching : a bilabial phoneme d...
circa 12 anni fa
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Try 1.5.4: Celsius to Fahrenheit
Write a program to convert an input given in Celsius to Fahrenheit. Examples: Input celsiusValue = 100 Output fahrValu...
circa 12 anni fa
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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...
circa 12 anni fa
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System of equations
Find a solution to a system of equations represented by a |n| by |n+1| matrix. For instance, [ 2 0 4; => 2*x = 4 ...
circa 12 anni fa
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Equal to their cube
Tell me three real numbers that are equal to their cubes?
circa 12 anni fa
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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 ...
circa 12 anni fa
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Are you in or are you out?
Given vertices specified by the vectors xv and yv, and a single point specified by the numbers X and Y, return "true" if the poi...
circa 12 anni fa
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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...
circa 12 anni fa
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Project Euler: Problem 9, Pythagorean numbers
A Pythagorean triplet is a set of three natural numbers, a b c, for which, a^2 + b^2 = c^2 For example, 3^2 + 4^2 =...
circa 12 anni fa
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Column norms of a matrix
Given a matrix M, return a vector y such that for each k y(k)=norm(M(:,k)) (y(k) is the Euclidean norm of the k-th col...
circa 12 anni fa
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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...
circa 12 anni fa
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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: ...
circa 12 anni fa
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Twins in a Window
<http://en.wikipedia.org/wiki/Twin_primes Twin primes> are prime numbers that differ by 2, such as [11,13] or [41,43]. Write a f...
circa 12 anni fa
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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...
circa 12 anni fa
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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...
circa 12 anni fa
