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Ratio between sum of primes and sum of factors

Write a function that calculates the ratio between the sum of primes numbers lower or equal to x, and the sum of the factors of ...

7 months ago

Solved

07 - Common functions and indexing 6

Create a variable _m_ as a magic square with the size 6 x 6 Magic squares are defined as square matrices, where the sum of a...

8 months ago

Solved

Return unique values without sorting

If the input vector A is [42 1 1], the output value B must be the unique values [42 1] The *values of B are in the s...

8 months ago

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Returning a "greater than" vector

Given a vector, v, return a new vector , vNew, containing only values > n. For example: v=[1 2 3 4 5 6] n=3 vNew =...

8 months ago

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Back to basics 7 - Equal NaNs

Covering some basic topics I haven't seen elsewhere on Cody. Given 2 input variables, output true if they are equal, false ot...

8 months ago

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Add 3 numbers

In this problem, you have to add three numbers a, b and c. Give output d = add(a,b,c)

8 months ago

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Test Problem; Create a 5x5 array containing all ones

This is a test for learning the process of creating a Cody problem. The goal of this test problem will be to create an array,...

8 months ago

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Sum of Two Numbers

Given two integer numbers x and y, calculate their sum and put it in z. Examples: Inputs x = 2, y = 4 Output z is 6 ...

8 months ago

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matrix of natural number

Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 resides seially as shown in the examples below. ...

8 months ago

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Sphenic number sequence

<http://oeis.org/A007304 Sphenic numbers> are positive integers that are products of three distinct prime numbers: 30, 42, 66, 7...

8 months ago

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Determine if input is odd or even

Determine if input is odd or even, sample problem

8 months ago

Solved

Calculate the square of a number (Super Easy)

The goal is to calculate the square (y) of a number (x). Good way to start MatLab for beginners.

8 months ago

Problem

Ratio between sum of primes and sum of factors

Write a function that calcualtes the ratio between the sum of primes numbers lower or equal to x, and the sum of the factors of ...

8 months ago | 0

Problem

Ratio between sum of primer numbers and non-prime numbers

Write a function that calculates the ratio between the sum of the prime numbers lower or equal than x, and the sum of the non-pr...

8 months ago | 0

Solved

Sum of a geometric series

Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.

8 months ago

Problem

Sum of a geometric series

Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.

8 months ago | 0

Problem

Get the value 100

Knowing that 123-45-67+89=100, write a function that gives this result for any order of the digits in the input. Otherwise, the ...

8 months ago | 0

Problem

Get the mean digit

Write a function that gives the mean digit (round towards nearest integer) of an input and positive number. For example: x ...

8 months ago | 0

Problem

Check if is a square

Given four coordinates, write a function to check if they form a square on the XY plane.

8 months ago | 0

Solved

Calculate numerical integration.

x=0:0.01:1 y=@(x)x.^2 Using given two inputs(x and y), conduct numerical integration in x. (hint: trapz)

8 months ago

Solved

Create a constant offset.

Add a constant offset to an array. Example a = [1 3 5 9] offset = 2 y = [3 5 7 11]

8 months ago

Solved

Determinant of a 3x3 Matrix

Return the determinant of a 3x3 matrix. The built-in Matlab function det is not allowed.

8 months ago

Solved

Sum of the Multiplication of Vectors

Given the vectors x and y as input, multiply the vectors and return the summation of its elements. Example: x = [1 2 ...

8 months ago

Solved

Square the input

Given a scalar or vector x, return the square of each element. Example x = [7 2] answer = [49 4]

8 months ago