# David Hill

Electrical Engineering with minors in Computer Science, Mathematics, and Creative Writing.

Working as Undergraduate Research Assistant in the field of Computational Photonics

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**Content Feed**

How can I find same arrays in cell of arrays?

c=1; for m=1:41 for n=m+1:42 if isequal(A{m}(:,1:2),A{n}(:,1:2)) idx(c,:)=[m,n];%index pairs that have matchi...

3 days ago | 0

How to retrieve the list of numbers from which the average of a normal simulation is derived?

n = 5000; %Number of Simulations, sample size x1 = 75:125; %Mean simulation range y1 = 1:40; %Standard Deviation range N=...

3 days ago | 0

| accepted

How to do math to entirety of a vector?

[1:selectSpaces(1),diff(selectSpaces)+1:selectSpaces(2)];

3 days ago | 0

Solved

Create a square matrix with given conditions

Create a square matrix, M, which should be populated as follows: M = [ n^2 n * (n-1) n * (n-2) ... n * 2 n * ...

4 days ago

Solved

Set x value to each odd index of vector y.

Set x value to each odd index of vector y.

4 days ago

Solved

Find the sines of an isosceles triangle when given its area and height

Find the sines of an isosceles triangle when given its area and height. For example, when A=60 and h=5, the result is [0.3752...

4 days ago

Solved

Convert array of decimal numbers into hexadecimal numbers array.

Convert array of decimal numbers into hexadecimal numbers array. Example x =[ 32 33 34 35 36 37 38 ...

4 days ago

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Tridiagonal matrix

Given vectors u and v, make a tri-diagonal symmetric matrix such that u is in the main diagonal and v is below and above diagona...

4 days ago

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Calculate feeling temperature before climbing a mountain

I sometimes climb a mountain. As is well known, when the altitude becomes 100 (m) higher, the temperature lowers by 0.6 degrees...

4 days ago

Solved

Delete the column with all 0 !

Delete the column with all 0 data in a matrix(x). e.g. input x = 1 0 0 4 5 0 7 0 ...

4 days ago

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Average of odd values

Find the average of odd values in given a matrix. e.g x=[ 4 11 8 ; 9 2 7 ] y =( 11 + 9+ 7 ) / 3

4 days ago

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Average of even-numbered columns

Given a vector, find the average of even-numbered columns. e.g x = [ 4 6 8 9 1 2 7 ] y = ( 6 + 9 + 2 ) / 3

4 days ago

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Remove multiples of N

in the vector x remove all multiples of N. x = [1 2 3 4 5 6]; N = 2; Then y = [1 3 5];

5 days ago

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Binary Inversion

Given the unsigned 8-bit integer x, return the number y which is the binary inversion of x. For example if x is 5, y should b...

5 days ago

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Count the numbers

In a array x, count the number of times the number n appears in x. for example: x = [1 2 3 4 3 2 1 2] and n = 2 the answer sh...

5 days ago

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Counting votes

x is a vector of votes, e.g. x=[1 2 3 2 2 1 3 2 1 2 2 2 2], who is the winner? 1,2,3?

5 days ago

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Odd times even numbers in a matrix

First count the number of odd numbers in x, then the number of even. Return their product. example: x = [1 2] One odd ...

5 days ago

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Add the even numbers

Add only the even numbers of x example: x = [1 2 3 4 5] the positive numbers are: 2 4, so their sum is 6

5 days ago

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Add the odd numbers

Add only the odd numbers of x example: x = [1 2 3 4 5] the positive numbers are: 1 3 5, so their sum is 9

5 days ago

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All odd - all even

All odd numbers in x are added, while all even numers are subtracted from this. example: x = [1 2 3 4 5]; y = +(1+3+5)-...

5 days ago

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Second smallest number

What is the second smallest number in x? example: x = [1 2 3 4 5 6 7 8 9] y = 2

5 days ago

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Odd times 3

Given a input matrix x, multiply all odd values by 3. Even values remain the same. example: x = [1 2 3 4 5;... 6 7...

5 days ago

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Add the positive numbers

Add only the positive numbers of x example: x = [-2 -1 0 1 2 3] the positive numbers are: 1 2 3, so their sum is 6

5 days ago

Solved

Easy Sequences 22: Sum of Proper Fractions

Let 'F' be the set of all proper fractions in lowest term, whose denominator is less than or equal 'd'. So, for d = 10, we have:...

5 days ago

Solved

A matrix of introverts

You are given a matrix full of numbers who happen to be very shy. Write a MATLAB function that will put a square of zeros aroun...

7 days ago

Solved

Determine value using Look-up table method

Given a set of 2 vectors x and y related in a certain way, you are supposed to find value of y (ydash) given a particular value ...

7 days ago

How to reset a variable in a for loop?

Use indexing. X=1+rand(1,10); for i=1:10 Y=X(i)+5;%whatever you do. end

7 days ago | 0