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David Hill


Last seen: en dag ago 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
How to plot digital sequence in MATLAB
n=1:length(u); a=1.7; plot(n,a.^n.*u);%assuming u is a vector

en dag ago | 0

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Answered
Replace NaN values in a matrix with values from another matrix
B(isnan(B))=A(isnan(B));

en dag ago | 0

| accepted

Answered
Error using plot Vectors must be the same length.
t = linspace(0,1,n);%vector t needs to be same length as y_m

en dag ago | 0

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Answered
How do I change the sign without altering the other and how can I do the factorial denominator? 1-1/3!+1/5!-1/7!+... and perform the sum?
disp('serie 4: 1-1/3!+1/5!-1/7!+...' ) n=input('Enter a number: '); Sum=0; for j=1:n Sum = Sum + (-1)^(j+1)/factorial(2*...

en dag ago | 0

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Solved


Accumulate Cells
Given a combining function, a cell array, and an initial value, accumulate the result. For example, accumcell(@plus,{1,...

2 dagar ago

Solved


Generate the Figure-Figure sequence
After discussing Scott Kim’s FIGURE-FIGURE Figure (below) in Gödel, Escher, Bach, Douglas Hofstadter introduced an integer seque...

2 dagar ago

Answered
average for all looping
No loop needed. average_a=mean(randi(10,1,10))

2 dagar ago | 0

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Solved


Find the slope of a line that passes through two vectors
Given two vectors p1 and p2, return the slope of a line that passes through p1 and p2. Examples: Input [p1,p2] = deal([0,1],[...

2 dagar ago

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(...

6 dagar 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...

6 dagar ago | 0

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

6 dagar 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...

6 dagar 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...

6 dagar 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 ...

6 dagar ago | 0

Answered
5th polynomial coding
Look at polyfit function.

6 dagar 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...

6 dagar ago | 0

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

6 dagar 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

6 dagar 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 ...

6 dagar 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];

6 dagar 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 ...

6 dagar 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...

6 dagar 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;

6 dagar ago | 0

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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...

6 dagar 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...

6 dagar 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...

6 dagar 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;

6 dagar 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. ...

7 dagar ago

Solved


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

7 dagar 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 ...

7 dagar ago

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