45 total contributions since 2010

Benjamin Kraus is a Software Engineer at MathWorks. He earned his B.S. in Biological Engineering (with a minor in Computer Science) at Cornell University, and his M.S. and Ph.D. in Biomedical Engineering at Boston University. His Ph.D. thesis in the field of Neuroscience involved studying episodic memory using electrophysiology to measure brain activity in awake behaving rats.

Submitted

readPLXFileC

A MEX function to read a PLX data file (Plexon, Inc.).

6 years ago | 4 downloads |

Submitted

nanconv

Convolution in 1D or 2D ignoring NaNs and (optionally) correcting for edge effects.

6 years ago | 20 downloads |

Submitted

nantowhite

Convert a 2D matrix into an image with NaNs replaced by white

6 years ago | 1 download |

Submitted

nanconvn

Convolution in ND ignoring NaNs and (optionally) correcting for edge effects.

6 years ago | 1 download |

Solved

Find state names that end with the letter A

Given a list of US states, remove all the states that end with the letter A. Example: Input s1 = 'Alabama Montana Nebras...

7 years ago

Solved

Kaprekar Steps

6174 is the <http://en.wikipedia.org/wiki/6174_%28number%29 Kaprekar constant>. All natural numbers less than 10,000 (except som...

7 years ago

Solved

Find relatively common elements in matrix rows

You want to find all elements that exist in greater than 50% of the rows in the matrix. For example, given A = 1 2 3 5 ...

7 years ago

Solved

Alphabetize by last name

Given a list of names in a cell array, sort the list by the last name. So if list = {'Barney Google','Snuffy Smith','Dagwood ...

7 years ago

Solved

Interpolator

You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

7 years ago

Solved

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...

7 years ago

Solved

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...

7 years ago

Solved

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...

7 years ago

Solved

The Hitchhiker's Guide to MATLAB

Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

7 years ago

Solved

Pizza!

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

7 years ago

Solved

Weighted average

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

7 years ago

Solved

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...

7 years ago

Solved

Sort numbers by outside digits

Sort the array so that they are sorted as if their value was a 5 digit number made from the first three and last two digits of t...

7 years ago

Solved

Poker Series 05: isStraight

The Poker Series consists of many short, well defined functions that when combined will lead to complex behavior. Our goal is t...

8 years ago

Solved

Poker Series 04: isFlush

The Poker Series consists of many short, well defined functions that when combined will lead to complex behavior. Our goal is t...

8 years ago

Solved

Poker Series 03: isFullHouse

The Poker Series consists of many short, well defined functions that when combined will lead to complex behavior. Our goal is t...

8 years ago

Solved

Poker Series 02: isQuads

The Poker Series consists of many short, well defined functions that when combined will lead to complex behavior. Our goal is to...

8 years ago

Solved

Poker Series 01: isStraightFlush

The Poker Series consists of many short, well defined functions that when combined will lead to complex behavior. Our goal is t...

8 years ago

Solved

Eight Queens Solution Checker

Write a function to verify whether an arrangement of queens on a chessboard is a valid solution to the classic <http://en.wikipe...

8 years ago

Solved

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...

8 years ago

Solved

Duplicates

Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

8 years ago

Solved

Summing Digits within Text

Given a string with text and digits, add all the numbers together. Examples: Input str = '4 and 20 blackbirds baked in a...

8 years ago

Solved

Replace NaNs with the number that appears to its left in the row.

Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

8 years ago