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David Hill


684 total contributions since 2017

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Answered
How to store Values in a Loop?
for t=0:10 L = 3*cos(t); M = diag([L 5*cos(t) 7*cos(t)]); K = [12e5*cos(t) 18e5*cos(t) 34e5*cos(t);18e5*cos(t) 15...

etwa 4 Stunden ago | 0

| accepted

Answered
Plotting a temperature Depth Profile
A = readmatrix('name.xls');%I will assume temperature is in the first column and depth in the second column B = readmatrix('nam...

etwa 5 Stunden ago | 0

Answered
I am trying to plot a function with iteration of a variable
Not sure what t is, but you do not need a for-loop. r = 0:.01:a; Vc = ((r.^2 - (a-d)^2)/(4*viscosity_c))*dpdz1; plot(Vc,r);

etwa 6 Stunden ago | 0

Answered
How to store an x-y coordinate under one Variable
I really don't understand. How are your data points stored? Why is it easier with a single vector rather than two? You can alway...

etwa 6 Stunden ago | 0

| accepted

Answered
How can I plot scatter graphs in a for loop?
Assume you have your data in a matrix, M. Assume you want a scatter plot of the column vs. mean of each column. scatter(1:size(...

etwa 6 Stunden ago | 0

Solved


Calculate the square root of a number
Input a Output b = srt(a)

etwa 13 Stunden ago

Solved


The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

etwa 13 Stunden ago

Solved


BASICS - sum part of vector
Please make a function, where as input you get vector "x" and and vector "c", where in "c" vector you get indexes to sum. Examp...

etwa 13 Stunden ago

Answered
Deleting columns corresponding to time value
data=data(:,data(1,:)>3);

etwa 14 Stunden ago | 0

Answered
Caesar's cypher Encryption
function coded=caeser(v,a) coded=char(mod(v-32+a,95)+32); end

ein Tag ago | 0

Submitted


Curve448 Shared-Key Generation GUI
Elliptic Curve Cryptography using curve-448. Generates private-key times a given x-coordinate point (input) the is on the ellipt...

2 Tage ago | 1 download |

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Solved


Elliptic Curve Cryptography (ECC) Point Addition
Given two points (P and Q, they can be the same points on the elliptic curve), compute ECC point addition on a Weierstrass ellip...

2 Tage ago

Problem


Elliptic Curve Cryptography (ECC) Point Addition
Given two points (P and Q, they can be the same points on the elliptic curve), compute ECC point addition on a Weierstrass ellip...

2 Tage ago | 1

Answered
vector to upper and lower triangular matrix
Not sure what elements you want above and below the diagonal. a=repmat(A,[length(A),1]).*~diag(ones(1,length(A)))+mean(A)*eye(l...

2 Tage ago | 0

Submitted


Curve25519 Shared-Key Generation GUI
Elliptic Curve Cryptography using curve-25519. Generates private-key times a given x-coordinate point (input) the is on the elli...

2 Tage ago | 2 downloads |

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Answered
Creating Random Vector with Set intervals
How long do you want the vectors to be? Why not make a matrix where each row has the vectors? M=zeros(10); for i=1:10 M(i...

3 Tage ago | 1

Answered
Addition to specified elements in a vector with for loop to create a new vector
xx=[x(1:3);x(1:3)+2.5]; xx=[xx(:)',x(4:end)];

3 Tage ago | 0

| accepted

Answered
Creating a For loop for a Harmonic Series
last is not an array; therefore last(i) does not work! function x = HarmArray(last) x=zeros(1,last); for i=1:last x(i)=1...

3 Tage ago | 0

Answered
How many laps a runner can make for 45 minutes with increasing 10% of running time in each lap
function laps=runTrack(t,dt,rt) %first lap time: t %total run time: rt %percent increase in each lap: dt M=cumsum(t*((1+dt)*...

4 Tage ago | 0

| accepted

Answered
Calculating the sum of A elements which are numbers between 30 and 65
You had it! A=randi([10,100],8,20); B=0; for i=1:8 for j=1:20 if A(i,j)>30 && A(i,j)<65 B=B+A(i...

4 Tage ago | 1

| accepted

Answered
matrix dimensions must agree
Length of x and y must be equal since they are points. The following functions evaluations lagrange polynomial at each value of ...

7 Tage ago | 0

Answered
If statement multiple condition overposing
No need for a loop. Noncompliance=sum(LeftFrontLegX<=0 & RightFrontLegX>=0);

8 Tage ago | 0

Answered
Index in position 1 exceeds array bounds
If imfindcircles finds less than 5 circles you are going to error. A = imread('circle.png'); imshow(A); [centers, radii, metr...

8 Tage ago | 1

| accepted

Answered
Extract number from file name
Look at regexp function. I assume your input is a string array and you want a string array output. a='K_5_6.5.json'; b=regexp(...

8 Tage ago | 1

| accepted

Answered
How to wirte the matrix G
n=whatever size matrix you want. G=eye(n)+diag(ones(1,n-1),-1)+diag(ones(1,n-2),-2);

10 Tage ago | 1

Answered
Transform a set of "if" arguments into a unified "for" function
if n_dice==1 Z=randi(6,1,n_trials); else Z=sum(randi(6,n_dice,n_trials)); end

10 Tage ago | 0

| accepted

Answered
How to categorize a range
function BMIdetermination() a=input("Enter your height in cm: "); b=input("Enter your weight in g: "); Gender=input("Enter nu...

10 Tage ago | 0

| accepted

Answered
how can i put multiple matrices into a struct?
A and B are maxtrixes of any size. m=struct('matrix',{A,B}); struct field is 'matrix', so m(1).matrix == A and m(2).matrix == ...

10 Tage ago | 0

| accepted

Answered
Summing values from a loop
function [P,S,He,Hy,RegList]= f() condition = true; count=1; while condition regNum = input('Enter balloon registration ...

10 Tage ago | 0

| accepted

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