Community Profile

# Duane Hanselman

### University of Maine

27 total contributions since 2012

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Solved

Derivative of polynomial
Compute the derivative of a given polynomial. The input is an <http://www.mathworks.com/help/matlab/math/representing-polynomial...

7 years ago

Solved

Is the paranthesis sequence balanced ?
Quantum mechanics and computer science are interested in <http://en.wikipedia.org/wiki/Bra%E2%80%93ket_notation bra-kets>. Today...

7 years ago

Solved

Convert elements in numeric array into different class
Write a function that converts elements in a numeric array into a different class. Example: a = [1:5]; % class: double b...

8 years ago

Solved

Create matrix of replicated elements
Given an input element x, and the dimensions, (m, n) return a matrix of size m x n filled with element x. Example: Input: ...

8 years ago

Solved

Output any real number that is neither positive nor negative
Output any real number that is neither positive nor negative

8 years ago

Solved

Find max
Find the maximum value of a given vector or matrix.

8 years ago

Solved

Calculate the sum of two numbers. Example input = [2 3] output = 5

8 years ago

Solved

sum of non-primes
The sum of the non-primes below 10 is 1+4+6+8+9+10=38 Find the sum of all the non-primes below the input, N.

8 years ago

Solved

Largest Twin Primes
<http://en.wikipedia.org/wiki/Twin_prime Twin primes> are primes p1, p2 = p1 + 2 such that both p1 and p2 are prime numbers. Giv...

8 years ago

Solved

Reverse the elements of an array
Reverse the order of elements in an array: eg: input X = [ 1 2 3 ; 4 5 6 ; 7 8 9 ] o...

8 years ago

Solved

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...

8 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...

8 years ago

Solved

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 ...

8 years ago

Solved

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

8 years 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 ...

8 years ago

Solved

Make a 1 hot vector
Make a vector of length _N_ that consists of all zeros except at index _k_, where it has the value 1. Example: Input ...

8 years ago

Submitted

Fit Polynomial to Data with Constraints
essentially polyfit with many added features

Submitted

Linearly Interpolate Triangulation
Interpolate a triangulation based on a given triangulation matrix TRI.

Submitted

Spline and Piecewise Polynomial Tool
Create, manipulate, differentiate, and integrate splines

Submitted

Improved 2-D Streamlines
More comprehensive streamline computation than stream2 in MATLAB.

Submitted

Creation and manipulation of Fourier Series
Create, manipulate and evaluate Fourier Series

Submitted

Contour Line Smoothing
Smooths contour lines by fitting them with a 2-D spline.

Submitted

Extract contour data from contour matrix C
Extract contour data created by CONTOUR, CONTOURF, CONTOUR3, and CONTOURC.

Submitted

Compute gradient on triangle faces or their vertices for triangulated data

Submitted

Contour Plot for Scattered Data
Triangular Contour Plot

Submitted

Quiver plot for scattered data
Quiver plots directly from scattered data