Andrew Horchler

Last seen: 9개월 전 | 2012년부터 활동

Followers: 1 Following: 0

메시지

We're going to the Moon! I'm the Chief Research Scientist at Astrobotic heading their Future Missions and Technology team (https://astrobotic.com/technology). My Ph.D. in Mechanical Engineering at Case Western Reserve University was in the area of biologically inspired robotics with particular interests in mechanical design, soft robotics, dynamical systems, computational neuroscience, and numerical simulation. I have over 25 years of experience with Matlab and C.

Programming Languages:
Python, C++, C, Javascript, MATLAB, HTML, CSS, Arduino, Shell
Spoken Languages:
English, French

통계

All

배지 보기

Feeds

문제를 풀었습니다

Approximation of Pi
Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given number of...

대략 1년 전

문제를 풀었습니다

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

대략 1년 전

문제를 풀었습니다

MATLAB Basic: rounding
Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

대략 1년 전

문제를 풀었습니다

Toeplitz Matrix
For a given square matrix of order n-by-n check whether this is a Toeplitz matrix or not. Return true if it is.

1년 초과 전

문제를 풀었습니다

Mysterious digits operation (easy)
What is this digit operation? 0 -> 0 1 -> 9 121 -> 9 44 -> 6 15 -> 5 1243 -> 7 ...

1년 초과 전

문제를 풀었습니다

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.

거의 12년 전

문제를 풀었습니다

Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

거의 12년 전

문제를 풀었습니다

Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

대략 12년 전

문제를 풀었습니다

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

12년 초과 전

문제를 풀었습니다

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

12년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

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

13년 초과 전

문제를 풀었습니다

Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

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

13년 초과 전

문제를 풀었습니다

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. Example...

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

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 ...

13년 초과 전

문제를 풀었습니다

Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

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

13년 초과 전

문제를 풀었습니다

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

13년 초과 전

문제를 풀었습니다

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...

13년 초과 전

문제를 풀었습니다

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

13년 초과 전

문제를 풀었습니다

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

13년 초과 전