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David Hill


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4 182 total contributions since 2017

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Answered
Defining a simple function with text/string 'on'
function darkmode(a) gca; if a ans.GridColor = [1, 1, 1]; set(ans,'color','k'); else ans.GridColor = [.15,.15,...

environ 10 heures ago | 0

Answered
Average of 2 columns within a 3 column matrix
for k=1:60 x(k)=mean(X(:,:,k),'all','omitnan'); end

1 jour ago | 0

Solved


Solve an ODE: equation B

1 jour ago

Answered
Bessel function. Determining the roots.
Looks like file exchange has a good zero finder for Bessel functions. https://www.mathworks.com/matlabcentral/fileexchange/4840...

1 jour ago | 0

Answered
I want to calculate each v value from each diameter value, then the value of Re one by one, and for all the calculations in the for loop,but this code give me single value for v, Re, f . Where am I doing wrong? Sorry I'm beginner in mtlab.
No loop needed. L=(2000+(5*50)); T=5+5*0.25; It=0.0075*L; ht=0.15*T; bt=0.50*It; e=0.0003*(5+50); t=15000/sqrt(9.81/ht); ...

1 jour ago | 0

| accepted

Solved


Solve an ODE: equation A

5 jours ago

Answered
Why is histcount ignoring one of the edge values in my matrix?
a=readmatrix('GPeak_Histogram_Data.txt'); Aedges = unique(a(:,2)); Acounts = histc(a(:,2), Aedges);%use histc or a=readmatr...

5 jours ago | 0

| accepted

Solved


List Proth primes

5 jours ago

Solved


Flip coins

5 jours ago

Answered
pad matrix to a particular size
assuming m and n are both even. M_resized=padarray(M,[(150-size(M,1))/2 (150-size(M,2))/2],0,'both');

5 jours ago | 1

Answered
How to evaluate a function that has been saved to a variable
syms x; f = 2*tanh(x/2); d1 = diff(f); d2 = diff(f,2); d3 = diff(f,3); fplot(f,[-1,1]); hold on; fplot(d1,[-1,1]); fplot...

5 jours ago | 1

Answered
How to reconstruct a matrix?
z=diag([y;0]); z(end,:)=x(1:length(z)); z(:,end)=x(1:length(z));

5 jours ago | 1

Answered
Generating adjacency matrix for following network
Graph has to be a polygon. numNodes=6; a=randperm(numNodes); b=circshift(a,1); g=graph(a,b); plot(g); m=full(adjacency(g))...

5 jours ago | 0

| accepted

Answered
New to matlab. Trying to make a script to reorganize excel data
a=readcell('yourcellname'); b=unique(a(:,2)); newCell=b'; for k=1:length(b) newCell(2,k)={a(ismember(a(:,2),b{k}),1)}; en...

12 jours ago | 0

Answered
Relative Ranking of position in an array
If a is your matrix above. sum(find(a==1)-find(a==2)<0);

12 jours ago | 0

| accepted

Solved


Determine if input is even

13 jours ago

Solved


Add 100

13 jours ago

Answered
Need helping in setting a for loop for the below code
u=unique(condIds,'stable');%not sure if you only want to go through the unique entries; otherwise, you will have duplicates for...

14 jours ago | 0

Answered
Rerun script with different table input
You should always attempt to index. Put all your tables into a single cell array. t{1}=table1; t{2}=table2; %then index into ...

14 jours ago | 0

| accepted

Solved


Cannon Ball
Given g (acceleration due to gravity) and desired altitude x, find the minimum ground velocity of a cannon ball to reach x.

15 jours ago

Solved


Close MATLAB with keyboard
Close MATLAB with keyboard without using mouse

15 jours ago

Solved


Basic electricity in a dry situation
&#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#9889 &#...

15 jours ago

Solved


The shortest man in the world

15 jours ago

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