# David Hill

Electrical Engineering with minors in Computer Science and Mathematics. Working as Undergraduate Research Assistant in the field of Computational Photonics

**Programming Languages:**

Python, C++, C, Java, MATLAB, HTML, Arduino

**Spoken Languages:**

English, Spanish

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**Content Feed**

extracting data from set of data

t=readtable('owid-covid-data_2020-21.csv'); u=unique(t.Location); count=0; for k=1:length(u) m=movsum(diff(t.TotalCases(...

3 jours ago | 0

Compare a vector values with martix having multiple rows

yourMatrix=[randi(2,20,2),5*rand(20,3)]; yourVector=5*rand(20,3); newMatrix=yourMatrix(yourMatrix(:,3)<=yourVector(1)|yourMatr...

3 jours ago | 0

| accepted

Multiple plots in one figure (not subplot)

Look at stackedplot tbl = readtable("patients.xls","TextType","string"); stackedplot(tbl,["Height","Weight","Systolic","Diasto...

3 jours ago | 0

| accepted

Can I add a text annotation to a tiledlayout figure?

subPlotNames = 'ABCDEFGH'; fig = figure(1); hold on; set(gca,'FontSize',12,'FontName','Calibri'); for i = 1:8 x=randi(r...

3 jours ago | 0

Can someone run this function and give the results as I have 2017 version and I believe there are some functions that work in latest versions

Yes, code runs. All three buttons work properly. nodeXY = [ 0 0; 10 5; 10 0; 20 8;20 0; 30 9; 30 0; 40 8; 40 0; 50 ...

3 jours ago | 0

How to add values into rows of cell array?

Assuming the values to be added are in a matrix (3x6) for k=1:6 yourCell{k}=randi(256,3,18)-1;%populate yourCell end valu...

3 jours ago | 0

Save regression output (fitlm) into table

Save in a cell array. I might not be understanding you completely. for k=1:10 Model=%your code c{k}=Model; end

3 jours ago | 0

Code doesn't run through whole array

With a couple changes the code runs. v.V_kmh=real(v.V_kmh);%needs to be real (I inserted this line here) for i=1:tracksize ...

3 jours ago | 0

| accepted

I want to concatenate two matrix of size 1x122 and 1x128, but I am getting error of "Dimensions of arrays being concatenated are not consistent" , how can I solve the issue ?

DeciYear=readmatrix('DeciYear.xlsx'); DeciYear1=readmatrix('DeciYear1.xlsx'); dy=[DeciYear,DeciYear1];

3 jours ago | 0

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I don't understand the condition from FOR row 16 to row 26

The whole nested for-loop is just used to display results_numeric. If you don't care about displaying, you can delete the whole ...

3 jours ago | 0

Solved

Factor Digits

Check if a given number in an array of numbers is - Equidigital Number - A number that has the same number of digits as the num...

3 jours ago

How to convert to nan

FF= [1 2 3 4 5; 6 7 8 9 10; 11 12 13 14 15]; FF(FF>5&FF<14)=nan;

3 jours ago | 0

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How to find data

t=readtable('owid-covid-data_2020-21.csv'); u=unique(t.Location); s=zeros(1,length(u)); for k=1:length(u) s(k)=sum(t...

3 jours ago | 0

separating numbers in cells

Do you mean a cell array like this? a={'1-8','7-1','8-4';'4-6','8-5','7-3'}; m=zeros(size(a));n=zeros(size(a)); for k=1:numel...

3 jours ago | 0

How to code to perform the following tasks?

n=2;npop=5;Location=1:137; Locations=reshape(Location(randperm(length(Location),n*npop)),npop,n); s=[9476,4739,3157,2650]; Si...

3 jours ago | 0

| accepted

How to define variable (for later use) that contains another defined variables

np=5;ns=3; n=@(np,ns)np/ns; f=n(np,ns)+1; np=8;ns=5; f=n(np,ns)^2+3;

4 jours ago | 1

Solved

Split a given string from the first instance of a given character

A simple operation to split a given string into two substrings at the point where the desired character is first found. e.g. ...

4 jours ago

Solved

newRMS

find root mean square of a signal x in less time than the test code and accurate to six places.

4 jours ago

Solved

Find the particular dividend

It is known that once you write the sequence 10101...101 long enough, the number will be finally divisible by any odd number if ...

4 jours ago

How to delete a Matrix in a 3D Matrix?

idx=[]; for k=1:size(T5,3) if any(isnan(T5(:,:,k)),'all') idx=[idx,k]; end end T5(:,:,idx)=[];

4 jours ago | 0

| accepted

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...

4 jours ago

Solved

Generate a melodic contour string matrix

<http://en.wikipedia.org/wiki/Parsons_code Parsons code> is a surprisingly effective way to identify music by its melodic motion...

4 jours ago

Solved

Eliminate Polysyllabics: Long live short words!

Given a string s1, return s2 in which all the words with more than one syllable have been removed. To make things simple, we ...

4 jours ago

Solved

Simple Decoder Ring

The stereotypical _decoder ring_ is remembered as a cereal box prize from the 1950s. Kids learned about cryptography by startin...

4 jours ago

Solved

Generate a Parasitic Number

This problem is the next step up from <http://www.mathworks.com/matlabcentral/cody/problems/156-parasitic-numbers Problem 156>. ...

9 jours ago

Solved

Polygonal numbers

The task of <http://www.mathworks.co.uk/matlabcentral/cody/problems/5 Problem 5> is to calculate triangular numbers. By playing ...

10 jours ago

Solved

Find the 9's Complement

Find the 9's complement of the given number. An example of how this works is <http://electrical4u.com/9s-complement-and-10s-c...

10 jours ago