Paul Johnson

Last seen: más de 3 años hace | Con actividad desde 2020

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Problema

Find the point of intersection of tangents.
Given two points on a conic, find the point of intersection of the corresponding tangents. The conic is given in Cartesian co...

alrededor de 4 años hace | 0 | 4 solvers

Problema

Find the shortest distance between a point and a straight line.
Given the Cartesian coordinates of three points A, B and C (in a flat Euclidean space), find the shortest distance between the ...

alrededor de 4 años hace | 1 | 14 solvers

Resuelto

Kepler's Equation
Solve <http://en.wikipedia.org/wiki/Kepler's_equation Kepler's Equation>. Note that the solution is rounded down to 5 decima...

alrededor de 4 años hace

Resuelto

Calculate the height of an object dropped from the sky
Assume that an object is dropped from 1000 meters above the surface of the earth at time t=0. The object is dropped such that t...

alrededor de 4 años hace

Pregunta

Problem editing a draft Cody problem.
Hello, I have saved some draft Cody problems, but I am unable to edit these drafts. A message appears to the effect that "some...

alrededor de 4 años hace | 0 respuestas | 0

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Resuelto

Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

alrededor de 4 años hace

Resuelto

Indexed Probability Table
This question was inspired by a Stack Overflow question forwarded to me by Matt Simoneau. Given a vector x, make an indexed pro...

alrededor de 4 años hace

Resuelto

Project Euler: Problem 1, Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

alrededor de 4 años hace

Resuelto

Bullseye Matrix
Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

alrededor de 4 años hace

Resuelto

Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

más de 4 años hace

Resuelto

Knight's Tour Checker
Given a matrix a, determine whether or not a legal <http://en.wikipedia.org/wiki/Knight's_tour knight's tour> is present. The kn...

más de 4 años hace

Resuelto

Add two numbers
Given a and b, return the sum a+b in c.

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Resuelto

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

más de 4 años hace

Resuelto

Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

más de 4 años hace

Resuelto

Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

más de 4 años hace

Resuelto

Is my wife right?
Regardless of input, output the string 'yes'.

más de 4 años hace

Resuelto

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

más de 4 años hace

Resuelto

Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

más de 4 años hace

Resuelto

Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

más de 4 años hace

Resuelto

Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

más de 4 años hace

Resuelto

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.

más de 4 años hace

Resuelto

Inner product of two vectors
Find the inner product of two vectors.

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Get the length of a given vector
Given a vector x, the output y should equal the length of x.

más de 4 años hace

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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

más de 4 años hace

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

más de 4 años hace

Resuelto

Back to basics 6 - Column Vector
Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector, output true or false whether it is a colu...

más de 4 años hace

Resuelto

Sum the numbers on the main diagonal
Sum the numbers on the main diagonal of an n-by-n matrix. For input: A = [1 2 4 3 6 2 2 4 7]...

más de 4 años hace

Resuelto

Area of a circle
Find the value for area of the circle if diameter is given

más de 4 años hace

Resuelto

Vectors counting by 2
Create a vector numbers from 7 to 15 in increments of 2

más de 4 años hace

Resuelto

find the maximum element of the matrix
for e.g x = [1 2; 3 4] y = 4

más de 4 años hace

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Paul Johnson

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