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David Hill


Last seen: Today Active since 2017

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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Answered
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

Answered
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

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Answered
sorting a matrix by another matrix
A(:,B)

3 jours ago | 0

Answered
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

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Answered
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

Answered
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

Answered
5th polynomial coding
Look at polyfit function.

3 jours ago | 0

Answered
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

Answered
Can I add a text annotation to a tiledlayout figure?
Look at text function

3 jours ago | 0

Answered
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

Answered
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

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Answered
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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Answered
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

Answered
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

| accepted

Answered
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

Answered
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

Answered
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

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Answered
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

Answered
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

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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

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