Stefan Wehmeier

MathWorks

Active since 2011

Followers: 0 Following: 0

Message

Working on the symbolic toolbox, mostly in the MuPAD language. Responsible for solvers and simplifiers.
Professional Interests: computer algebra

Statistics

All

RANK
850
of 298.313

REPUTATION
90

CONTRIBUTIONS
0 Questions
24 Answers

ANSWER ACCEPTANCE
0.00%

VOTES RECEIVED
15

View badges

Feeds

Solved

Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

meer dan 10 jaar ago

Solved

Make a Palindrome Number
Some numbers like 323 are palindromes. Other numbers like 124 are not. But look what happens when we add that number to a revers...

meer dan 10 jaar ago

Solved

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

meer dan 10 jaar ago

Solved

Which doors are open?
There are n doors in an alley. Initially they are all shut. You have been tasked to go down the alley n times, and open/shut the...

meer dan 10 jaar ago

Solved

De-dupe
Remove all the redundant elements in a vector, but keep the first occurrence of each value in its original location. So if a =...

meer dan 10 jaar 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 ...

meer dan 10 jaar ago

Solved

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...

meer dan 10 jaar ago

Solved

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 ...

meer dan 10 jaar ago

Solved

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...

meer dan 10 jaar ago

Solved

Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

meer dan 10 jaar ago

Solved

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

meer dan 10 jaar ago

Solved

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

meer dan 10 jaar ago

Solved

Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

meer dan 10 jaar ago

Solved

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...

meer dan 10 jaar ago

Solved

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...

meer dan 10 jaar 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...

meer dan 10 jaar ago

Solved

Who knows the last digit of pi?
There is only one man who knows the last digit of pi, who is that man? Give the name of that man, who, by popular believe, can ...

meer dan 10 jaar 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...

meer dan 10 jaar ago

Solved

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

meer dan 10 jaar ago

Solved

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:...

meer dan 10 jaar 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...

meer dan 10 jaar ago

Solved

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...

meer dan 10 jaar ago