David Hill
Last seen: Today
4 172 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
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...
ungefär 2 timmar ago | 0
| accepted
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');
ungefär 19 timmar ago | 1
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...
ungefär 19 timmar ago | 1
How to reconstruct a matrix?
z=diag([y;0]); z(end,:)=x(1:length(z)); z(:,end)=x(1:length(z));
ungefär 20 timmar ago | 1
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))...
ungefär 20 timmar ago | 0
| accepted
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...
8 dagar ago | 0
Relative Ranking of position in an array
If a is your matrix above. sum(find(a==1)-find(a==2)<0);
8 dagar ago | 0
| accepted
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...
9 dagar ago | 0
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 ...
9 dagar 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.
11 dagar ago
Solved
Basic electricity in a dry situation
⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ ⚡ &#...
11 dagar ago
How to show the iterations and the answers and the graph
Why not use a while loop? m = 68.1; g = 9.81; t = 10; v = 40; f =@(c) (g*m*(1-(exp((-c*t)/m)))/c)-v; err = 1e-10; c = 0.1...
11 dagar ago | 0
Not seeing second plot data
theta = 0:0.02:1; y = sin(theta); plot(theta, y, theta, 1- (theta - y)./y);%need ./ also to keep it the same scale chose 1 ins...
11 dagar ago | 1
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