# Duane Hanselman

### University of Maine

Electrical Engineering professor. Coauthor of the "Mastering MATLAB" book series.

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Solved

Sum the squares of numbers from 1 to n

For a given value of n return the sum of square of numbers from 1 to n. Example For n = 2 then sum of squares = 5 (1^2 + ...

5 years ago

Solved

Polynomial Evaluation

Create a routine that takes a list of coefficients of a polynomial in order of increasing powers of x; together with a value of ...

5 years ago

Solved

multiple of nine?

Given a positive number n, return true if n is a multiple of 9 and false if not. Do not make the division and do not use functio...

5 years ago

Solved

prime to each other

Given two integers n1, n2 greater than 1, find out if they have common divisors or are prime to each other. Return "true" if the...

5 years ago

Solved

Get all corner elements from a matrix where dimension of matrix is always equal to or greater than 2.

if a given matrix a = [1 2 3;4 5 6]; so answer is going to be [1 3;4 6]

6 years ago

Solved

Find the product of a Vector

How would you find the product of the vector [1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0] times 2?; x = [1 : 0.5 : 6]; y ...

6 years ago

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Skip by a multiple

Given an integer create an array of its multiples. Array must have a length of 15

6 years ago

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Cumulative product of a vector

Cumulative product of a vector example x=[1 2 5 10], then answer must be [ 1 2 10 100] *If you like this prob...

6 years ago

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Print the largest eigenvalue of A(500)

Write a function that prints the largest eigenvalue of A(500), without any extraneous output. For a positive integer n, let A...

6 years ago

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Find the rank of a matrix

Determine the rank of a matrix without using the MATLAB function of the same name.

6 years ago

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Array resizing: Removing elements

* Remove elements 2, 4, and 6 from row array pendingTasks

6 years ago

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Constructing column arrays

* Construct a column array elevatorStops with values 2, 4, 5, 9, and 10

6 years ago

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Union of two set decreasing order

Union of two set decreasing order Say, x=[1 2 5] and y=[5 7 8] then answer must be [8 7 5 2 1]

6 years ago

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Beginner's Problem - Squaring

Try out this test problem first. Given the variable x as your input, square it by two and put the result in y. Examples: ...

6 years ago

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Determinant without using det()

Given a square matrix A, compute the <http://en.wikipedia.org/wiki/Determinant determinant> of A. Note that you may not use t...

6 years ago

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Remove and Sort

Given a randomized array n, sort it and remove all odd integers. n=5 y = [2 4]

6 years ago

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Remove the positive integers.

Given array,x, remove all the positive numbers and display ouput as y. Example x=[1 -2 3 -4] , output is y=[-2 -4].

6 years ago

Solved

Evaluate Polynomial

Given a polynomial equation coefficients in a vector p, you have to return its value at x. Example: For inputs p and x ...

7 years ago

Solved

Polynomial Multiplication

Multiply two polynomial equation.Given polynomial coefficients a and b.

7 years ago

Solved

Hard limit function

Classify x data as if x>=0 then y=1 if x<0 then y=0 Example x = [ -2 -1 0 1 2] y = [ 0 0 1 1 1]

7 years ago

Solved

Find supported functions

Given a function name, return true if that function is supported by the toolboxes that are installed with MATLAB on this machine...

7 years ago

Solved

Vector Magnitude Calculator

'a' is a vector that starts at the origin and ends at (x, y). Find ||a||. Hint: It is as simple as "ABC".

7 years ago