elias GR

Last seen: 5 mois il y a | Actif depuis 2012

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Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

plus de 7 ans il y a

A résolu

radius of a spherical planet
you just measured its surface area, that is the input.

plus de 7 ans il y a

Problème

Maximum of ND-array
Find the maximum element of a N dimensional array. Example: A=[1 2 4 ; -20 4 10]; The maximum is 10.

plus de 7 ans il y a | 1 | 64 solveurs

A résolu

Convert a vector to a lower triangular matrix
I now have a row vector and I want to convert it to a lower trilangular matrix. The rows of the lower trilangular matrix have...

plus de 7 ans il y a

A résolu

Number of primes
Count the number of primes less than 'n'.

plus de 7 ans il y a

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Simple polynomial evaluation
Compute the value of a polynomial of degree n with all coefficients '1', at value x. n is always n>=0. p(x)=1+x+x^2+...+x^n...

plus de 7 ans il y a

Problème

Sum of digits of 2^n number
Given n, find the *cumulative* sum of the digits of the number 2^n (where n>=0). Example: Input n = 7 Output sum = 2 ...

plus de 7 ans il y a | 0 | 28 solveurs

A résolu

Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

plus de 7 ans il y a

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Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

plus de 7 ans il y a

A résolu

Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

plus de 7 ans il y a

A résolu

Circle area using pi
Given a circle's radius, compute the circle's area. Use the built-in mathematical constant pi.

plus de 7 ans il y a

A résolu

Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

plus de 7 ans il y a

A résolu

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

plus de 7 ans il y a

A résolu

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...

environ 12 ans il y a

Problème

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...

environ 12 ans il y a | 4 | 464 solveurs

A résolu

First N Perfect Squares
*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];

environ 12 ans il y a

A résolu

Cannon Ball
Given g (acceleration due to gravity) and desired altitude x, find the minimum ground velocity of a cannon ball to reach x.

environ 12 ans il y a

A résolu

Tell me the slope
Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];

environ 12 ans il y a

A résolu

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

environ 12 ans il y a

A résolu

Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

environ 12 ans il y a

A résolu

Pascal's Triangle
Given an integer n >= 0, generate the length n+1 row vector representing the n-th row of <http://en.wikipedia.org/wiki/Pascals_t...

environ 12 ans il y a

A résolu

inner product of two vectors
inner product of two vectors

environ 12 ans il y a

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Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

environ 12 ans il y a

A résolu

Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

environ 12 ans il y a

A résolu

Target sorting
Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

environ 12 ans il y a

A résolu

Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

environ 12 ans il y a

A résolu

Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

environ 12 ans il y a

A résolu

The Goldbach Conjecture, Part 2
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

environ 12 ans il y a

A résolu

Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

environ 12 ans il y a

A résolu

Sort a list of complex numbers based on far they are from the origin.
Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

environ 12 ans il y a

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