# Gerard Stockil

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**Content Feed**

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Tridiagonal

Return an n-by-n matrix that has a, b, c as the subdiagonal, main diagonal, and superdiagonal entries in the matrix. Example ...

6 days ago

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Approximate the cosine function

Without using MATLAB trigonometric functions, calculate the cosine of an argument |x| to a precision of |0.0001| *Hint:* You ...

7 days ago

Solved

Hydrogens in a Saturated Hydrocarbon

Given (c) carbon atoms in a saturated hydrocarbon molecule (all single bonds), how many hydrogen atoms (h) are in the molecule?

12 days ago

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Odd row

Create a row 'y' with odd numbers where the potential maximum number is given by 'x' and the space between them by 'm'. The firs...

12 days ago

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Find the maximum two numbers of every column of a matrix

Find the maximum two numbers of every column of a matrix. Example: If we input a matrix A = [ 1 2 4 6 0 3 ...

12 days ago

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Total resistance of resistors in parallel

What is the total resistance of a number of resistors in parallel? A vector R contains the resistances (in Ohm) of n resistors,...

12 days ago

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Calculate value of capacitor

Given the value of resistance and time at which capacitor charges to it's 99%. calculate the value of capacitor

12 days ago

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Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

12 days ago

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Triangle Numbers (★★)

(copy of problem 5) Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3...

12 days ago

Solved

Determine if a Given Number is a Triangle Number

*Description:* Determine if the elements of an input array are triangle numbers and return the result as an array with the sa...

12 days ago

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Find out characteristics equation of given matrix.

Find out characteristics equation of given matrix. A=[0 2; 1 8] then char. eq is s^2-8*s-2=0 and answer should be [1 -8 -2]

13 days ago

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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...

13 days ago

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Find minimum and maximum elements of an array

For a given array find minimum and maximum elements of an array and store minimum value in first index of output and maximum in ...

13 days ago

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Wind outward from the center ...

Create an n-by-n matrix with elements ranging from 1 to n^2 in a rectangular spiral pattern. Example if n = 5 : 21 ...

13 days ago

Solved

Total resistance of resistors in series

What is the total resistance of a number of resistors in series? A vector R contains the resistances (in Ohm) of n resistors, w...

14 days ago

Solved

Polygon Interior Angle Sum

Given the number of sides of a regular polygon, find the sum of interior angles. Return 0 for input for which regular polygon a...

16 days ago

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Sum the elements in either diagonal of a square matrix

Sum the elements of a square matrix that lie on either the major diagonal or anti-diagonal. (Include all elements that are part ...

18 days ago

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How to find the position of an element in a vector without using the find function

Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

18 days ago

Solved

Back and Forth Rows

Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

18 days ago

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matrix zigzag

Unfold a 2-D matrix to a 1-D array in zig-zag order, e.g., for matrix [ 1 2 3 ; 4 5 6 ; 7 8 9 ] the resulting 1-...

18 days ago

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Dots in a Circle

Return how many integer grid points there are inside a circle of radius _r_ centred at (0,0) (including points on the edge). ...

19 days ago

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The Ulam Matrix

The Ulam spiral is simple to describe. On a gridded piece of paper, write down the number 1. Then write successive integers as y...

20 days ago

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Determine if input is a perfect number

A <http://en.wikipedia.org/wiki/Perfect_number/ perfect number> occurs whent the sum of all divisors of a positive integer, exce...

20 days ago

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Sum the Digits of a Number

Given an integer, sum the digits repeatedly until you end up with a single value less than 10. For example, if you add the di...

20 days ago

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Response of First Order Control Systems

In practice, the input signal to an automatic control system is not known ahead of time but usually random in nature. Thus, in t...

20 days ago

Solved

Separate even from odd numbers in a vector - without loops

*Without using loops*, rearrange a vector of integers such that the odd numbers appear at the beginning, and even numbers at the...

20 days ago