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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...

8 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...

8 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


Add two numbers
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

8 years ago | 6 downloads |

Submitted


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

8 years ago | 8 downloads |

Submitted


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

8 years ago | 5 downloads |

Submitted


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

8 years ago | 4 downloads |

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Submitted


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

8 years ago | 4 downloads |

Submitted


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

8 years ago | 11 downloads |

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Submitted


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

8 years ago | 17 downloads |

Submitted


Gradient for scattered data
Compute gradient on triangle faces or their vertices for triangulated data

8 years ago | 5 downloads |

Submitted


Contour Plot for Scattered Data
Triangular Contour Plot

8 years ago | 33 downloads |

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Quiver plot for scattered data
Quiver plots directly from scattered data

8 years ago | 4 downloads |

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Submitted


Comprehensive Polar Plots
Polar plots with handle graphics type parameter setting. Includes log radius support.

8 years ago | 13 downloads |

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