David Hill
Last seen: 1 day ago
4,087 total contributions since 2017David Hill's Badges
Answer 3 questions that were unanswered for more than 30 days
Awarded to David Hill on 11 Jan 2021
Contribute at least one answer each month for 12 consecutive months
Awarded to David Hill on 02 Aug 2020
Solve all the problems in Number Manipulation II problem group
Awarded to David Hill on 06 Apr 2021
Solve all the problems in Draw Letters problem group
Awarded to David Hill on 03 Apr 2021
Solve all the problems in Cody Problems in Japanese problem group
Awarded to David Hill on 10 Mar 2021
Your submissions received 5 five star ratings
Awarded to David Hill on 16 Sep 2020
Your submissions were downloaded 100 or more times in a month
Awarded to David Hill on 03 Mar 2020
Publish your first comment or rating
Awarded to David Hill on 09 Oct 2019
Solve all the problems in Cody Challenge
Awarded to David Hill on 24 Feb 2021
Solve all the problems in Computation Geometry I
Awarded to David Hill on 24 Feb 2021
Receive 25 likes on a problem you have created
Awarded to David Hill on 09 Nov 2020
Solve all the problems in Matrix Manipulation I
Awarded to David Hill on 30 Oct 2020
Solve all the problems in Indexing II
Awarded to David Hill on 19 Mar 2020
Solve all the problems in Sequences & Series III
Awarded to David Hill on 14 Feb 2020
How do i save values for each iteration ?
a = [0.01 0.01 0.01 0.03 0.1 0.2 0.3 0.3 0.3 0.4 0.4 0.4 0.3 0.4 0.5 0.8 0.9 1...
23 hours ago | 0
| accepted
Not enough input arguments
y =@(x)1./sqrt(1+x.^2)+exp(-x/5).*cos(sqrt(1+x.^2))-0.0486;%I would just use an anonymous function x=0:.01:10; plot(x,y(x));
23 hours ago | 0
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Average values only next to each other in a matrix
I don't think there is an easy way, but a simple loop works. A = [ 62.9; 63; 83.10; 83; 43; 43; 63; 63.2; 83; 83; 62.90; 62.90 ...
23 hours ago | 0
How to change a value in one column dependent on another table column?
a=unique(table1.Var2); for k=1:length(a) b=find(table1.Var2==a(k)); for j=2:length(b) table1.Var1(b(j))=table1.Var1(...
2 days ago | 0
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adding noise to images
black=find(image==0); white=randperm(length(black),floor(x/100*length(black))); image(white)=uint8(255);
2 days ago | 0
Make if statement more readable
if numel(intersect(VID1{index(1)},VID2{index(2)}))||... numel(intersect(VID2{index(2)},VID3{index(3)}))||... n...
2 days ago | 0
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why is my plot not working
t=1:10; F=1./(4.^t)-1./(5.^t); plot(t,F);
2 days ago | 2
| accepted
How to call columns of matrices using 'for loop' ?
s=diag(S); for i=1:3 Approx(:,:,i)=U(:,i)*V(:,i)'*s(i);%I am assuming this is what you want, s(i) being scalar along the dia...
2 days ago | 0
How to split .mat file data into different variables?
a=readmatrix('yourData'); m=reshape(a,1024,[]);%why not just keep in a matrix that you can index into?
3 days ago | 0
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How to apply a colormap to rgb image ?
I=imread('Capture3.PNG'); I_gray= im2gray(I); imshow(I_gray); colormap('jet');
3 days ago | 1
Remove corresponding values in two arrays
A = [9,1,5,2,3,2] ; B = [12,23,41,4,10,6]; x = [1,2,5,9,]; % values to keep in A new_A = A(ismember(A,x)); new_B = B(ismemb...
3 days ago | 0
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Code with function file not working
No reason for global variables. Problem is equation P=X*(1+r/100)^t;%need X*
3 days ago | 1
Symbolic expressions inside of array
syms x y f = x^2; g = y^3; a = [f,g]; subs(a,x,3);
3 days ago | 0
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for loop outsite functions
Can't you just put the loop in your pushbutton function and pass the loop variable to your other functions? function Messungsta...
4 days ago | 0
Only saving last run for loop
pie(1)=0; for i=1: 560; z=z+dz; pie(i+1)=pie(i)-((g/(cp*thetav(z)))*z); end
6 days ago | 1
| accepted
implement the A matrix using for loop
Why do you need a for-loop? Looks like you have the idea. A=zeros(2*length(x),6); A(1:2:end,1)=x; A(1:2:end,2)=y; A(1:2:end,...
8 days ago | 0
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Creating a histogram,
Use histogram(), the matlab documentation is quite good. https://www.mathworks.com/help/matlab/ref/matlab.graphics.chart.primit...
8 days ago | 0
Indexing a value from other cell arrays into a new column
for k=1:size(distances,1) a=flip(indeces(distances(k,1),:)); distances(k,3)=arrays(a(1),a(2)); end
9 days ago | 0
| accepted
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